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This bibliography is complied automatically using Reference Manager 9.5, a bibliographic database system. The system automatically searches university and other public research library catalogs and compiles a database of references that match the search headings entered by the user.

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• John A. O'Brien, Steps to Christian unity 1st ed. ed. 321 p vols (Garden City, N.Y: Doubleday, 1964).
• O'Gara, Margaret. The Petrine ministry in the ecumenical gift exchange. --. 1990.: (Periodical)
• Margaret O'Gara, The ecumenical gift exchange xii, 180 p vols (Collegeville, Minn: Liturgical Press, 1998).
• Ron O'Grady and World Council of Churches, Bread and freedom: understanding and acting on human rights vl, 81 p vols, The Risk book series (Geneva: World Council of Churches, 1979).
• Ron O'Grady and World Council of Churches, Third world stopover: the tourism debate ix, 73 p vols, The Risk book series (Geneva: World Council of Churches, 1981).
• Ron O'Grady, Christian Conference of Asia, and Affairs Desk International, Banished: the expulsion of the Christian Conference of Asia from Singapore and its implications 103 p vols (Kowloon: Christian Conference of Asia, International Affairs Committee, 1990).
• Charles A. O'Neill and Bernard J. Cooke, Ecumenism and Vatican II xii, 146 p vols (Milwaukee: Bruce Pub. Co, 1964).
• Simeon Wilberforce O'Neill, A contribution to the cause of Christian unity: or, The thoughts of an Indian missionary on the controversies of the day ATLA fiche 1988-2662 ed. xiii, 258 p vols, ATLA monograph preservation program (London: J. T. Hayes, 1879).
• Mercy Amba Oduyoye, World Council of Churches, and Ecumenical Decade of the Churches in Solidarity with Women (Program), Who will roll the stone away?: the Ecumenical Decade of the Churches in Solidarity with Women 69 p vols, Risk book series (Geneva: WCC Publications, 1990).
• Oecumenische Raad van Kerken in Nederland. Gemeenschap der Kerken.: (Periodical)
• Oeuvre catholique russe du diocése de Nice. Union.: (Periodical)
• Thomas H. Olbricht, Hans Rollmann, and Thomas Campbell, The quest for Christian unity, peace, and purity in Thomas Campbell's Declaration and address: text and studies xxi, 489 p vols, ATLA monograph series (Lanham, Md: Scarecrow Press, 2000).
• One who dearly loves all those whose conversation becomes Christ's Gospel, Christian unity exhorted to: being a few words in tender love to all professing of Christianity in old England, the land of my nativity: wherein the difference between profession and possession of that which is really the substance of true religion, is clearly manifested: also, the great breach of Christian charity, caused by their furious contentions about formality: with a few words to the poor in spirit, concerning my opinion of a saving knowledge of Christ Jesus 733:28 ed. [3], 13 p vols, Early English books, 1641-1700 (London: s.n., 1678).
• Huub Oosterhuis, The children of the poor man 55 p vols (Geneva: World Council of Churches, 1980).
• Huub Oosterhuis, Anybody, everybody 44 p vols, Risk book series (Geneva: World Council of Churches, 1981).
• Levi Oracion, World Council of Churches, and Commission on the Churches' Participation in Development, Ideologies and people's struggles for justice, freedom, and peace: a consultation report 110 p vols, Occasional study pamphlet (Geneva: World Council of Churches, Commission on the Churches' Participation in Development, 1989).
• Order of Christian Unity and Medical Committee, Light in the darkness: disabled lives?: papers on some contemporary medical problems viii, 109 p vols (London: Unity Press, 1981).
• Grace Douglass Orr, A layman's guide to ecumenicity xi, 100 p vols (s.l: s.n, 1956).
• Ofelia Ortega and World Council of Churches, Women's visions: theological reflection, celebration, action xi, 182 p vols (Geneva: WCC Publications, 1995).
• Orthodox Theological Society and Fellowship of St.Alban and St.Sergius, An Orthodox response to the preliminary draft for the fourth assembly of the World Council of Churches: to be held at Uppsala [22] p vols (London: Fellowship of St. Alban and St. Sergius, 1968).
• Switzerland Orthodoxon Kentron tou Oikoumenikou Patriarcheiou (Chambésy, Les Dialogues oecuméniques hier et aujourd'hui 5 ed. 415 p vols, Etudes théologiques de Chambésy (Chambésy-Genève: Editions du Centre orthodoxe du Patriarcat oecuménique, 1985).
• Switzerland Orthodoxon Kentron tou Oikoumenikou Patriarcheiou (Chambésy, Orthodoxie et mouvement oecuménique 6 ed. 228 p vols, Etudes théologiques de Chambésy (Chambésy-Genève: Editions du Centre orthodoxe du Patriarcat oecuménique, 1986).
• Ronald E. Osborn, A response to Oberlin: a response of Disciples of Christ in the United States and Canada to the North American Conference on Faith and Order, September 3-10, 1957 40 p vols (Lexington, Ky: College of the Bible, 1960).
• Hans Otte and Richard Schenk, Die Reunionsgespräche im Niedersachsen des 17. Jahrhunderts: Rojas y Spinola, Molan, Leibniz 258 p vols, Studien zur Kirchengeschichte Niedersachsens (Göttingen: Vandenhoeck & Ruprecht, 1999).
• Albert Cook Outler, The Christian tradition and the unity we seek 1955 ed. xii, 165 p vols, Richard lectures (New York: Oxford University Press, 1957).
• Albert Cook Outler, Methodist Church (U.S.), and Joint Commission on Education and Cultivation, That the world may believe: a study of Christian unity xii., 195 p vols (New York: Joint Commission on Education and cultivation, Board of Missions of the Methodist Church, 1966).
• Garfield Bromley Oxnam, On this rock: an appeal for Christian unity 1st ed. ed. 117 p vols, Hoover lectures on Christian unity (New York: Harper, 1951).
• Garfield Bromley Oxnam, We intend to stay together!: a sermon delivered in First Methodist Church, Evanston, Illinois, August 15, 1954, at the opening service of worship of the Second Assembly of the World Council of Churches 32p vols (Chicago: Central Promotional Office, The Commission on Promotion and Cultivation of the Methodist Church, 1954).
• Archiv Ökumenisches and Friedrich Siegmund-Schultze, Inventarverzeichnis des Ökumenischen Archivs in Soest (Westfalen) 1 ed. 281 p vols, Soester wissenschaftliche Beiträge: Schriften des Ökumenischen Archivs (Soest: Westfälische Verlagsbuchhandlung, 1962).
• Lars Østnor, Kirkens enhet: et bidrag til forståelsen av norske teologers oppfatning av det økumeniske problem i mellomkrigstiden xv, 629 p vols (Oslo: Solum, 1990).
• René Pache, The ecumenical movement 1950 ed. 130, [2] p vols, Griffith Thomas memorial lectures (Dallas: Dallas Theological Seminary, 1951).
• Sang jung Pak, Han'guk kyohoe wa ek`yumenik`al undong 479 p vols (Soul-si: Taehan Kidokkyo Sohoe, 1992).
• Derek Palmer, Strangers no longer viii, 134 p vols (London: Hodder and Stoughton, 1990).
• Martin Palmer, What should we teach?: Christians and education in a pluralist world 63 p vols, Risk book series (Geneva: WCC Publications, 1991).
• Wolfhart Pannenberg, The Church 175 p vols (Philadelphia: Westminster Press, 1983).
• Antonios Papadopoulos, Martyria kai diakonia tes Orthodoxias semera 218 p vols, Oikoumenika (Thessalonike: Ekdotikos Oikos Aphoa Kuriakide, 1983).
• Damaskinos Papandreou, Wolfgang Bienert, and Knut Schäferdiek, Oecumenica et patristica: Festschrift für Wilhelm Schneemelcher zum 75. Geburtstag 405 p vols (Chambesy-Genf: Metropolie der Schweiz, 1989).
• Constance F. Parvey, World Council of Churches, and Commission on Faith and Order, Ordination of women in ecumenical perspective: workbook for the church's future 96 p vols, Faith and order paper (Geneva: World Council of Churches, 1980).
• Constance F. Parvey and World Council of Churches, The community of women and men in the church 1st Fortress Press ed ed. xiv, 201 p vols (Philadelphia: Fortress Press, 1983).
• Constantin G. Patelos, Eastern Church Orthodox, and World Council of Churches, The Orthodox Church in the ecumenical movement: documents and statements 1902-1975 360 p vols (Geneva: World Council of Churches, 1978).
• Gillian Paterson, Whose ministry?: a ministry of health care for the year 2000 xi, 120 p vols, Risk book series (Geneva: WCC Publications, 1993).
• Gillian Paterson, Love in a time of AIDS: women, health and the challenge of HIV, Risk book series ; no.72: Geneva: WCC Publications, 1995).
• Gillian Paterson and World Council of Churches, Love in a time of AIDS: women, health, and the challenge of HIV xv, 114 p vols, Risk book series (Geneva: WCC Publications, 1996).
• Gillian Paterson and World Council of Churches, Still flowing: women, God and church xviii, 124 p vols, Risk book series (Geneva: WCC Publications, 1999).
• Kuncheria Pathil, Models in ecumenical dialogue: a study of the methodological development in the Commission on "Faith and Order" of the World Council of Churches xxii, 515 p vols (Bangalore, India: Dharmaram Publications, 1981).
• Kuncheria Pathil and Center for Indian and Interreligious Studies, Indian churches at the crossroads ix, 143 p vols, Placid lecture series (Rome: Center for Indian and Interreligious Studies, 1994).
• David MacDonald Paton and R. M. C. Jeffery, Christian unity and the Anglican Communion: a survey 40 p vols (Westminster, London: Church Information Office, 1965).
• David MacDonald Paton, New forms of ministry no. 12 ed. 102 p vols, Research pamphlets (World Council of Churches. Commission on World Mission and Evangelism) (London: Published for the World Council of Churches, Commission on World Mission and Evangelism, by Edinburgh House Press, 1965).
• David MacDonald Paton et al., Christian unity and the Anglican Communion: a survey 2nd ed. revised ed. 54 p vols (London: Church Information Office, 1966).
• Anne Pattel-Gray, Through aboriginal eyes: the cry from the wilderness xix, 158 p vols (Geneva: WCC Publications, 1991).
• Anne Pattel-Gray, John P. Brown, and World Council of Churches, Indigenous Australia: a dialogue about the word becoming flesh in aboriginal churches x, 64 p vols, Gospel and cultures pamphlet (Geneva, Switzerland: WCC Publications, 1997).
• Anne Pattel-Gray, John P. Brown, and World Council of Churches, Indigenous Australia: a dialogue about the Word becoming flesh in aboriginal churches / Anne Pattel-Gray & John P. Brown, eds x, 64 p vols, Gospel and cultures pamphlet (Geneva: WCC Publications, 1997).
• Susanne S. Paul, Humanity comes of age: the new context for ministry with the elderly xvii, 143 p vols, Risk book series (Geneva: WCC Publications, 1994).
• Gregorios Paulos, The human presence: an orthodox view of nature 103 p vols (Geneva: World Council of Churches, 1978).
• Gregorios Paulos et al., Does Chalcedon divide or unite?: towards convergence in Orthodox Christology xii, 156 p vols (Geneva: World Council of Churches, 1981).
• Gregorios Paulos, The human presence: ecological spirituality and the age of the spirit 121 p vols (Amity, N.Y: Amity House, 1987).
• Gregorios Paulos, The meaning and nature of diakonia 44 p vols, Risk book series (Geneva, Switzerland: WCC Publications, 1988).
• Ernest A. Payne et al., Why integration?: An explanation of the proposal before the World Council of Churches and the International Missionary Council 80 p vols (London?: Edinburgh House Press, 1957).
• Ernest A. Payne, The World Council of Churches, 1948-1969 20 p vols (London: Baptist Union of Great Britain & Ireland, 1970).
• Jaroslav Jan Pelikan, William Caferro, and Duncan G. Fisher, The unbounded community: papers in Christian ecumenism in honor of Jaroslav Pelikan lv, 210 p vols, Garland reference library of the humanities (New York: Garland Pub, 1996).
• G. Penney, Computers in the social sciences: a study guide, Computers and people: [Manchester]: WCC Publications, 1973).
• Annie Perchenet, Chrétiens ensemble, journal d'Upsal: [IVe assemblée générale du conseil oecuménique des Églises], juillet 1968 206 p vols, Remise en cause (Paris: Desclée, 1968).
• Harvey L. Perkins, No night there: a report of the Third Assembly of the World Council of Churches, held at New Delhi, India, Nov. 18-Dec. 6, 1961 52 p vols (Sydney: Australian Council of Churches, 1962).
• Werner Petersmann, Wider die "Irrlehre" des Weltkirchenrates: zur Rassengliederung in Südafrika 68 p vols (Goslar: Hübener, 1975).
• Hans Pfeifer, World Council of Churches, and Bonhoeffer Komitee Internationales, Genf '76: e. Bonhoeffer-Symposion 188 p vols, Internationales Bonhoeffer Forum (München: Kaiser, 1976).
• Michel André Jean Philibert, Christ's preaching, and ours 55 p vols (London: Edinburgh House Press, 1963).
• T. V. Philip, Ecumenism in Asia 174 p vols (Delhi: ISPCK, 1994).
• W. S. F. Pickering et al., Anglican-Methodist relations: some institutional factors ix, 188 p vols (London: Darton, Longman & Todd, 1961).
• Henry R. Pike, Religion, red and rotten: a documentary examination of the liberal-leftist ecumenical movement, especially within the South African context 2nd ed ed. 101 p vols (Johannesburg: Christian Mission to Europe, 1975).
• Otto A. Piper, Protestantism in an ecumenical age: its root, its right, its task ix, 254 p vols (Philadelphia: Fortress Press, 1965).
• N. Barney Pityana, Charles Villa-Vicencio, and South African Council of Churches, Being the church in South Africa today: papers delivered at the consultation on South Africa in regional and global context: being the church today, Vanderbijlpark, March 19-23, 1995 xiv, 173 p vols (Johannesburg: South African Council of Churches, 1995).
• N. Barney Pityana, The ecumenical challenge for South Africa 1st ed ed. 21 p vols, Studies and reports by the EFSA Institute for Theological & Interdisciplinary Research: Development forum (Bellville, South Africa) (Bellville, South Africa: EFSA Institute, 1995).
• Antonie Plamadeala, Vocatie si misiune crestina în vremea noastra 457 p vols (Sibiu: s.n., 1984).
• Dafne Sabanes Plou, Global communication: is there a place for human dignity? xi, 74 p vols, Risk book series (Geneva: WCC Publications, 1996).
• Dafne Sabanes Plou and W. C. C. Publications, Peace in troubled cities: creative models of building community amidst violence [6], 133 p vols, Risk book series (Geneva Switzerland: WCC Publications, 1998).
• J. S. Pobee and Bärbel von Wartenberg-Potter, New eyes for reading: biblical and theological reflections by women from the third world viii, 108 p vols (Geneva: World Council of Churches, 1986).
• J. S. Pobee, Who are the poor?: the Beatitudes as a call to community 71 p vols, The Risk book series (Geneva: WCC Publications, 1987).
• J. S. Pobee and J. N. Kudadjie, Theological education in Africa: quo vadimus? viii, 238 p vols (Geneva: World Council of Churches, 1990).
• J. S. Pobee and World Council of Churches, West Africa: Christ would be an African too xi, 52 p vols, Gospel and cultures pamphlet (Geneva: WCC Publications, 1996).
• J. S. Pobee and World Council of Churches, Towards viable theological education: ecumenical imperative, catalyst of renewal ix, 164 p vols (Geneva: WCC Publications, 1997).
• J. S. Pobee and Gabriel Ositelu, African initiatives in Christianity: the growth, gifts and diversities of indigenous African churches -- a challenge to the ecumenical movement xiii, 73 p vols, Risk book series (Geneva: WCC Publications, 1998).
• John Pobee and World Council of Churches, Towards viable theological education: ecumenical imperative, catalyst of renewal: Geneva: WCC Publications, 1997).
• John S. Pobee and World Council of Churches, Who are the poor?: the Beatitudes as a call to community, The Risk book series ; no.32: Geneva: World Council of Churches, 1987).
• John S. Pobee and World Council of Churches, West Africa: Christ would be an African too xi, 52 p vols, Gospel and cultures pamphlet (Geneva: WCC Publications, 1996).
• John S. Pobee, Towards viable theological education: ecumenical imperative, catalyst of renewal: Geneva: WCC Publications, 1997).
• John S. Pobee and Gabriel Ositelu, African initiatives in Christianity: the growth, gifts and diversities of indigenous African Churches - a challenge to the ecumenical movement xiii, 73 p vols, Risk book series (Geneva: WCC Publications, 1998).
• C. J. Podmore et al., Anglican-Moravian conversations: the Fetter Lane common statement ; with Essays in Anglican and Moravian history by Colin Podmore no. 5 ed. 106 p vols, Occasional paper (Council for Christian Unity) (London: Council for Christian Unity of the General Synod of the Church of England, 1996).
• Colin Podmore et al., Anglican-Moravian conversations no. 5 ed. 106 p vols, Occasional paper (Council for Christian Unity) (London: Council for Christian Unity of the General Synod of the Church of England, 1996).
• Willem Hendrik van de Pol, The Christian dilemma: Catholic Church--Reformation xviii, 299 p vols (London: J.M. Dent & Sons, 1952).
• Heinrich Pompey, Caritas - das menschliche Gesicht des Glaubens: Ökumenische und internationale Anstösse einer Diakonietheologie 399 p vols, Studien zur Theologie und Praxis der Caritas und sozialen Pastoral (Würzburg: Echter, 1997).
• This scroll is addressed to the Archbishop of Syra and Tenos by a lady [i.e. Jane Porter]: with the earnest prayer that he will try and persuade the patriarchs of the Greek Church to call a synod whose object shall be the unity of the Christian Church, s.n., Montreal?
• Muriel Porter, Land of the spirit?: the Australian religious experience xi, 102 p vols, Risk book series (Geneva: WCC Publications, 1990).
• Klaus Poser, World Council of Churches, and Refugee and World Service Commission on Inter-Church Aid, Diakonia 2000: called to be neighbours: official report, WCC World Consultation, Inter-Church Aid, Refugee and World Service, Larnaca, 1986 ix, 133 p., [8] p. of plates vols (Geneva: WCC Publications, 1987).
• Philip Potter and A. J. Van der Bent, What in the world is the World Council of Churches?: an interview with Philip Potter no. 1 ed. 86 p vols, Risk book series (Geneva: World Council of Churches, 1978).
• Philip Potter, Life in all its fullness x, 173 p vols (Geneva: World Council of Churches, 1981).
• Philip Potter and Pauline Webb, Faith and faithfulness: essays on contemporary ecumenical themes: a tribute to Philip A. Potter xviii, 128 p vols (Geneva: World Council of Churches, 1984).
• Philip Potter, Thomas Wieser, and World Council of Churches, Seeking and serving the truth: the first hundred years of the World Student Christian Federation xi, 307 p., [8] p. of plates vols (Geneva: WCC Publications, 1997).
• J. Manning Potts, The Upper room: daily devotions for family and individual use Special editoin: World Council of Churches number ed. 179 p vols (Nashville, Tenn: The Upper Room, 1954).
• John Poulton, The feast of life: a theological reflection on the theme "Jesus Christ--the life of the world" viii, 78 p vols, The Risk book series (Geneva: World Council of Churches, 1982).
• Jan Hendrik Pranger, Dialogue in discussion: the World Council of Churches and the challenge of religious plurality between 1967 and 1979 198 p vols, IIMO research publication (Utrecht: Interuniversitair Instituut voor Missiologie en Oecumenica, 1994).
• Roy Preiswerk et al., The Slant of the pen: racism in children's books xvii, 154 p vols (Geneva: World Council of Churches, 1980).
• Ronald H. Preston and International Foundation, Technology and social justice: an international symposium on the social and economic teaching of the World Council of Churches from Geneva 1966 to Uppsala 1968 xx, 472 p vols (London: S.C.M. Press, 1971).
• Ronald H. Preston, Confusions in Christian social ethics: problems for Geneva and Rome xiii, 202 p vols (London: SCM Press, 1994).
• T. S. Preston, Lectures on Christian unity: delivered in S. Ann's Church, eigth-street, during the season of Advent, 1866 ; with an appendex on the condition of the Anglican communion and of the Eastern Churches 264 p vols (New York: D. and J. Sadlier, 1867).
• Tony Price, Church of England, and Council Evangelical, Evangelical Anglicans and the Lima text: an assessment and critique 25 p. -- vols, Grove worship series (Bramcote, Nottingham: Grove Books, 1985).
• Pro Oriente (Ecumenical foundation, Papers and minutes: second ecumenical consultation between theologians of the oriental Orthodox Churches and the Roman Catholic Church: Vienna-Lainz, September 3-9, 1973 208 p vols (Wien: published and edited by the ecumenical foundation Pro Oriente, 1974).
• W. C. G. Proctor, Roman Catholics and Protestants: essays critical and conciliatory 75 p vols (Worthing, West Sussex: Churchman Pub. of Worthing, 1985).
• J. F. Puglisi and S. J. Voicu, A bibliography of interchurch and interconfessional theological dialogues 260 p vols (Rome, Italy: Centro pro unione, 1984).
• Joan Puls, Every bush is burning: a spirituality for our times xii, 102 p vols, The Risk Book series (Geneva: World Council of Churches, 1985).
• Pascal de Pury, World Council of Churches, and Commission on the Churches' Participation in Development, People's technologies and people's participation 164 p vols (Geneva: Commission on Churches' Participation in Development, World Council of Churches, 1983).
• Quaker Home Service and London Yearly Meeting (Society of Friends), To Lima with love: the response from the Religious Society of Friends in Great Britain to the World Council of Churches document Baptism, Eucharist and Ministry 27 p vols (London: Quaker Home Service on behalf of London Yearly Meeting of the Religious Society of Friends (Quakers), 1987).
• John R. Quinn, The reform of the papacy: the costly call to Christian unity 189 p vols, Ut unum sint (New York: Crossroad Pub, 1999).
• Konrad Raiser, Ökumenische Diakonie, eine Option für das Leben: Beiträge aus der Arbeit des ÖRK zur theologischen Begründung ökumenischer Diakonie 156 p. -- vols, Beiheft zur Ökumenischen Rundschau (Frankfurt am Main: O. Lembeck, 1988).
• Konrad Raiser, Ecumenism in transition: a paradigm shift in the ecumenical movement? viii, 132 p vols (Geneva: WCC Publications, 1991).
• Konrad Raiser, To be the church: challenges and hopes for a new millennium xvii, 104 p vols, Risk book series (Geneva: WCC Publications, 1997).
• Cecil Rajendra, Songs for the unsung--: poems on unpoetic issues like war and want and refugees 66 p vols, The Risk book series (Geneva: World Council of Churches, 1983).
• Cecil Rajendra, Dove on fire: poems on peace, justice and ecology ix, 82 p vols, Risk book series (Geneva: WCC Publications, 1987).
• Jether Pereira Ramalho, World Council of Churches, and Commission on the Churches' Participation in Development, Signs of hope and justice 134 p vols (Geneva: Commission on the Churches' Participation in Development, World Council of Churches, 1980).
• André Randriantsalama, La voie malagasy: bouquet de poèmes de jeunesse 196, [1] p vols (S.l: s.n, 1984).
• Larry L. Rasmussen, Earth community, earth ethics xvi, 366 p vols (Geneva: WCC Publications, 1996).
• Joseph Ratzinger, Church, ecumenism, and politics: new essays in ecclesiology 278 p vols (New York: Crossroad, 1988).
• Robert Eldred Reber, The World Council of Churches and world development: proposals for adult education in the churches xii, 365 gb s vols (n.p., 1973).
• Ranjini Rebera and World Council of Churches, We cannot dream alone: a story of women in development: Geneva: WCC Publications, 0 AD).
• Ranjini Rebera et al., We cannot dream alone: a story of women in development xiii, 125 p vols (Geneva: WCC Publications, 1990).
• Ernie Regehr and Commission of the Churches on International Affairs, Militarism and the world military order: a study guide for churches xii, 69 p vols (Geneva: Commission of the Churches on International Affairs of the World Council of Churches, 1980).
• Harald Rein, Kirchengemeinschaft: die anglikanisch-altkatholisch-orthodoxen Beziehungen von 1870 bis 1990 und ihre ökumenische Relevanz Bd. 477 ed. v vols, Europäische Hochschulschriften (Bern: P. Lang, 1993).
• Marc Reuver and World Council of Churches, Christians as peace makers: peace movements in Europe and the USA x, 84 p vols (Geneva: WCC Publications, 1988).
• Marc Reuver, Friedhelm Solms, and Gerrit Huizer, The ecumenical movement tomorrow: suggestions for approaches and alternatives 410 p vols (Kampen: Kok, 1993).
• Marc Reuver, Requiem for Constantine: a vision of the future of church and state in the West 262 p vols (Kampen Netherlands: Kok, 1996).
• Marc Reuver, Faith and law: juridical perspectives for the ecumenical movement xiii, 133 p vols (Geneva: WCC Publications, 2000).
• Petr Rezek, Filosofie a politika kýce 1. vyd ed. 107 p vols, Edice Oikúmené (Praha: Institut pro stredoevropskou kulturu a politiku, 1991).
• Alan Richardson, The Biblical doctrine of work 80p vols, Ecumenical Biblical studies (London: SCM Press, 1952).
• Neville Richardson, The World Council of Churches and race relations, 1960 to 1969 78 p vols, Studien zur interkulturellen Geschichte des Christentums (Frankfurt/M: P. Lang, 1977).
• Russell E. Richey and United Methodist Board of Higher Education and Ministry (, Ecumenical & interreligious perspectives: globalization in theological education xvii, 152 p vols (Nashville: QR Books, 1992).
• Helmut Ristow and Helmuth Burgert, Konfession und Ökumene: Aspekte, Probleme, Aufgaben 588 p vols (Berlin: Evangelische Verlagsanstalt, 1965).
• Edmund W. Robb and Julia Robb, The betrayal of the church: apostasy and renewal in the mainline denominations 296 p vols (Westchester, Ill: Crossway Books, 1986).
• Ronald G. Roberson, The Eastern churches pastoral directory 31 p vols (Montreal: Roman Catholic Archdiocese of Montreal, 1984).
• E. Roberts-Thompson, With hands outstretched: Baptists and the Ecumenical Movement 1st ed. ed. 128 p vols (London, Marshall: Morgan & Scott, 1962).
• Wendy S. Robins et al., Speaking for ourselves: Bible studies and discussion starters by women x, 106 p vols (Geneva: WCC Publications, 1990).
• Wendy S. Robins, Rachel Angogo Kanyoro, and World Council of Churches, The power we celebrate: women's stories of faith and power ix, 102 p vols (Geneva: WCC Publications, 1991).
• Wendy S. Robins, Through the eyes of a woman: Bible studies on the experience of women Rev. ed ed. xx, 145 p vols (Geneva: World Council of Churches, 1995).
• Deborah Robinson and Rebecca Metaxa, Ogoni: the struggle continues Geneva vols (106 p: ill., maps, ports, 1930).
• Wendy S. Robinson and World Council of Churches, Through the eyes of a woman: Bible studies on the experience of women Rev. ed. ed.: Geneva: WCC: World WYCA Publications, 1995).
• William Robinson, Essays on Christian unity 287 p vols (London: James Clarke & Co, 1922).
• Patrick C. Rodger, World Council of Churches, and Commission on Faith and Order, Unity: a wide door and many adversaries 15 p vols, Faith and order paper (Geneva: World Council of Churches, Commission on Faith and Order, 1966).
• Patrick Campbell Rodger, Lukas Vischer, and World Council of Churches, Report 126 p vols (New York: Association Press, 1964).
• Patrick Campbell Rodger, World Council of Churches, and Commission on Faith and Order, Unity: a wide door and many adversaries 15 p vols, Faith and order paper (Geneva: World Council of Churches, Commission on Faith and Order, 1966).
• Pedro Rodríguez, Iglesia y ecumenismo 418 p vols (Madrid: Rialp, 1979).
• Barbara Rogers, World Council of Churches, and Programme to combat racism, Race: no peace without justice: churches confront the mounting racism of the 1980s ix, 132 p vols (Geneva: Programme to Combat Racism, World Council of Churches, 1980).
• Jacqueline Rolo, Philippa Stewart Craig, and Evangeline Parmenter, This is ecumenism: simplifications of the Decree on Ecumenism, Decree on the Eastern Catholic churches, and Declaration on the relation of the Church to non-Christian religions 78 p vols, Grail simplified Council documents (London: Geoffrey Chapman, 1967).
• Roman Catholic/Presbyterian-Reformed Consultation, Ethics and the search for Christian unity: two statements 46 p vols (Washington, D.C: United States Catholic Conference, 1980).
• Michael Root and Risto Saarinen, Baptism and the unity of the church vi, 209 p vols (Grand Rapids, Mich: W.B. Eerdmans, 1998).
• Stephen C. Rose, The development apocalypse: or, will international injustice kill the ecumenical movement? Spec. ed ed. 163 p vols (New York: National Council of Churches, 1967).
• Richard W. Rosseau, Interreligious dialogue: facing the next frontier v. 1 vols (Montrose, Penn: Ridge Row Press, c1981.
• Jacques Rossel, Uppsala 68: ein Aufruf zur kritischen Solidarität 63 p vols (Basel: F. Reinhardt, 1968).
• Parker Rossman, Ecumenical student workbook: an interpretive report on the USCC Ecumenical Student Conference, University of Kansas, Lawrence, Kansas, Dec. 27, 1948 to Jan. 1, 1949 128 p vols (New York: United Student Christian Council, 1949).
• Pierre Rossouw, Ecumenical panorama: a perspective from South Africa 1st ed ed. 398 p vols (S.l: s.n., 1989).
• Ruth Rouse, John R. Mott: an appreciation 26 p., [2] leaves of plates vols (Geneva: World's Student Christian Federation, 1929).
• Ruth Rouse and Stephen Neill, Geschichte der ökumenischen Bewegung 556 p. -- vols, Theologie der Ökumene (Göttingen: Vandenhoeck & Ruprecht, 1963).
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