Rabeau, Gaston. Réalité et Relativité. Paris: Marcel Rivière, 1927.
Rachels, James, editor. The Right Thing to Do: Basic Readings in Moral Philosophy. New York: Random House, 1989.
Radner, Daisie. Malebranche: A Study of a Cartesian System. Amsterdam: Van Gorcum, 1978.
Raemaeker, Louis de. Philosophie de l'Être. Essai de Synthèse Métaphysique. Louvain: Éditions Nauwelaerts, 1970.
Rahlfs, Alfred, editor. Septuaginta: Id est Vetus Testamentum graece iuxta LXX interpretes. 2 Vols. Stuttgart: Württemberbgische Bibelanstalt, 1935.
Rahner, Karl. Concern for the Church. New York: Crossroad, 1981.
Rahner, Karl. Nature and Grace. London: Sheed and Ward, 1963.
Rahner, Karl. The Content of Faith: The Best of Karl Rahner's Theological Writings. New York: Crossroad, 1992.
Rahner, Karl. Theological Investigations. Vol. II: Man in the Church. New York: Crossroad, 1982.
Rahner, Karl. Theological Investigations. Vol. III: The Theology of the Spiritual Life. New York: Crossroad, 1982.
Rahner, Karl. Theological Investigations. Vol. IV: Most Recent Writings. New York: Crossroad, 1982.
Rahner, Karl. Theological Investigations. Vol. V: Later Writings. New York: Crossroad, 1983.
Rahner, Karl. Theological Investigations. Vol. VI: Concerning Vatican Council II. New York: Crossroad, 1982.
Rahner, Karl. Theological Investigations. Vol. VII: Further Theology of the Spiritual Life I. New York: Crossroad, 1977.
Rahner, Karl. Theological Investigations. Vol. VIII: Further Theology of the Spiritual Life II. New York: Crossroad, 1977.
Rahner, Karl. Theological Investigations. Vol. IX: Writings of 1965-1967 I. New York: Crossroad, nd.
Rahner, Karl. Theological Investigations. Vol. X: Writings of 1965-1967 II. New York: Crossroad, 1977.
Rahner, Karl. Theological Investigations. Vol. XII: Confrontations. New York: Crossroad, 1974.
Rahner, Karl. Theological Investigations. Vol. XIII: Theology, Anthropology, Christology. New York: Crossroad, 1983.
Rahner, Karl. Theological Investigations. Vol. XIV: Ecclesiology, Questions in the Church, the Church in the World. New York: Seabury Press, 1976.
Rahner, Karl. Theological Investigations. Vol. XV: Penance in the Early Church. New York: Crossroad, 1982.
Rahner, Karl. Theological Investigations. Vol. XVI: Experience of the Spirit: Source of Theology. New York: Crossroad, 1983.
Rahner, Karl. Theological Investigations. Vol. XVII: Jesus, Man, and the Church. New York: Crossroad, 1981.
Rahner, Karl. Theological Investigations. Vol. XVIII: God and Revelation. New York: Crossroad, 1983.
Rahner, Karl. Theological Investigations. Vol. XIX: Faith and Ministry. New York: Crossroad, 1983.
Rahner, Karl. Theological Investigations. Vol. XXIII: Final Writings. New York: Crossroad, 1992.
Rahner, Karl, and Herbert Vorgrimler. Dictionary of Theology. New York: Crossroad, 1981.
Rahner, Karl, and Wilhelm Thusing. A New Christology. New York: Crossroad Books, Seabury Press, 1980.
Ramanuja. La Doctrine Morale et Métaphysique de Ramanuja. Olivier LaCombe, translator. Paris: Librairie d'Amérique et d'Orient, 1938.
Ramirez, Jacobus M. Opera Omnia, Tomus II: De Analogia. 4 vols. Madrid: Instituto de Filosofia "Luis Vives", 1970.
Ramirez, Santiago. Introducción a Tomás de Aquino. Madrid: Biblioteca de Autores Cristianos, 1975.
Ramos, Alice. Beauty, Art and the Polis. Washington, D.C.: American Maritain Association, 2000.
Ramos, Alice. Signum: de la Semiótica Universal a la Metafísica del Signo. Pamplona: Ediciones Universidad de Navarra, 1987.
Ranard, Henri, S.J. The Philosophy of Being. Milwaukee: The Bruce Publishing Co., 1948.
Rand, Ayn, and Nathaniel Branden. The Virtue of Selfishness: a New Concept of Egoism. New York: North American Library, 1964.
Randall, John Herman, Jr. Hellenistic Ways of Deliverance and the Making of the Christian Synthesis. New York: Columbia University Press, 1970.
Randall, John Herman, Jr. The Career of Philosophy. 2 vols. New York: Columbia University Press, 1962.
Randolph, John. Collected Letters of John Randolph of Roanoke to Dr. John Brockenbrough 1812-1833. New Brunswick, N.J.: Transaction Books, 1988.
Ranke-Heinemann, Uta. Eunuchs for the Kingdom of Heaven: Women, Sexuality, and the Catholic Church. New York: Doubleday, 1990.
Ransom, John Crowe. The World's Body. New York: Charles Scribner's Sons, 1938.
Rassam, Joseph. Thomas D'Aquin. Paris: Presses Universitaires de France, 1969.
Ratzinger, Joseph Cardinal. Co-Workers of the Truth: Meditations for Every Day of the Year. San Francisco: Ignatius Press, 1992.
Ratzinger, Joseph Cardinal. Dad Fest des Glaubens: Versuche zur Theologie des Gottesdienstes. Einsiedeln: Johannes Verlag, 1981.
Ratzinger, Joseph Cardinal. The Meaning of Christian Brotherhood. San Francisco: Ignatius Press, 1993.
Ratzinger, Joseph. The Theology of History in St. Bonaventure. Chicago: Franciscan Herald Press, 1971.
Ratzinger, Joseph Cardinal, and Hans Urs von Balthasar. Maria: Kirche im Ursprung. Fribourg, Switzerland: Herder, 1981.
Ratzinger, Joseph Cardinal / Pope Benedict XVI. Liberating Logos: Pope Benedict XVI's September Speeches. South Bend, IN: St. Augustine's Press, 2014.
Rauch, R. William, Jr. Politics and Belief in Contemporary France: Emmanuel Mounier and Christian Democracy, 1932-1950. The Hague: Martinus Nijhoff, 1972.
Raymond, M., OCSO. The Less Traveled Road: A Memoir of Dom Mary Frederic Dunn, OCSO, First American Trappist Abbot. Milwaukee, WI.: Bruce Publishing Co., 1953.
Raymond, M., OCSO. These Women Walked with God. The Saga of Citeaux: Third Epoch. Milwaukee, WI.: Bruce Publishing Co., 1956.
Raymond, M., OCSO. Three Religious Rebels: Forefathers of the Trappists. The Saga of Citeaux: First Epoch. New York: P. J. Kenedy & Sons, 1944.
Rea, Lilian. The Enthusiasts of Port-Royal. New York: Scribner's, 1912.
Read, Herbert. The Origins of Form in Art. New York: Horizon Press, 1965.
Reale, Giovanni. Il Concetto di Filosofia Prima. Milano: Società Editrice Vita e Pensiero, 1984.
Reale, Miguel. Expérience et Culture: Fondement d'une Théorie Générale de l'Expérience. Bordeaux: Éditions Biere, 1990.
Reardon, Bernard M. G. Roman Catholic Modernism. Stanford, CA: Stanford University Press, 1970.
Rebiot, G. Dieu Créateur, a Toi Nos Coeurs!. Lille, France: Librairie de Flandre, 1953.
Rebiot, G. L'Homme Cette Merveille. Lille, France: Librairie de Flandre, 1952.
Reclus, Maurice. Le Péguy que J'ai Connu: Avec 100 Lettres de Charles Péguy 1905-1914. Paris: Hachette, 1951.
Redpath, Peter A. Cartesian Nightmare: An Introduction to Transcendental Sophistry. Volume 41 of the Value Inquiry Book Series. Amsterdam & Atlanta: Rodopi, 1997.
Redpath, Peter A. Wisdom's Odyssey: From Philosophy to Transcendental Sophistry. Volume 46 of the Value Inquiry Book Series. Amsterdam & Atlanta: Rodopi, 1997.
Régamey, Pie-Raymond, O.P. Les Anges au Ciel et Parmi Nous. Paris: Librairie Arthème Fayard, 1959.
Régamey, Pie-Raymond, O.P. Art Sacré au XXe Siècle. Paris: Éditions du Cerf, 1952.
Régamey, Pie-Raymond, O.P. Non-Violence and the Christian Conscience. New York: Herder and Herder, 1966.
Régis, O.P._ L'Opinion Selon Aristote_. Paris: Libr. Philosophique J. Vrin & Ottawa: Inst. D'Études Médievales, 1935.
Regis, Louis-Marie, O.P. St Thomas and Epistemology. Milwaukee: Marquette University Press, 1946.
Regnery, Henry, editor. Viva Vivas! Essays in Honor of Eliseo Vivas on the Occasion of his Seventy-Fifth Birthday, July 13, 1976. Indianapolis, IN: Liberty Press, 1976.
Reichenbach, Bruce R. The Cosmological Argument. Springfield, IL: Charles C. Thomas Publisher, 1972.
Reichl, Karl. Tractatus de Grammatica: Eine Falschlich Robert Grosseteste Zugeschriebene Spekulative Grammatik. Munich: Schoningh, 1976.
Reid, Thomas. Essays on the Active Powers of the Human Mind. Cambridge and London: The M.I.T. Press, 1969.
Reilly, John P. Cajetan's Notion of Existence. The Hague & Paris: Mouton, 1971.
Reinhold, H. A. The American Parish and the Roman Liturgy. New York: Macmillan Co., 1958.
Reith, Herman, C.S.C. The Metaphysics of St. Thomas Aquinas. Milwaukee, WI: Bruce Publishing Co., 1962.
Renard, Henri, S.J. The Philosophy of Being. Milwaukee, WI: Bruce Publishing Co., 1946.
Renard, Henri, S.J. The Philosophy of God. Milwaukee, WI: Bruce Publishing Co., 1951.
Renard, Henri, S.J. The Philosophy of Man. Milwaukee, WI: Bruce Publishing Co., 1949.
Renard, Henri. S.J._ The Philosophy of Man._ Milwaukee, WI: Bruce Publishing Co., 1956.
Renard, Henri, S.J., and William Rossner, S.J. Philosophy of Conduct. Kansas City, MO: Rockhurst College, 1962.
Renoirte, Fernand. Éléments de Critique des Sciences et de Cosmologie. Louvain: Éditions de L'Institut Supérieur de Philosophie, 1947.
Requena, Federico Maria, Espiritualidad en la Espana de los Anos Veinte. Pamplona, Spain: EUNSA, 1999.
Le Reposoir: Chartreuse 1151-1901, Carmel 1922. Lyon, France: Scionzier, 1951.
Rescher, Nicholas. A System of Pragmatic Idealism. Vol. I: Human Knowledge in Idealistic Perspective. Princeton, N.J.: Princeton University Press, 1992.
Rescher, Nicholas. Introduction to Value Theory. Englewood Cliffs, NJ: Prentice-Hall, 1969.
Rescher, Nicholas. Process Metaphysics: An Introduction to Process Philosophy. Albany, N.Y.: State University of New York Press, 1996. {autographed by author}
Reta, Jose Oroz and Manuel A. Marcos Casquero. Etimologías de San Isidoro de Sevilla. 2 Volumes. Madrid: Biblioteca de Autores Cristianos, 1983.
Reves, Emery. The Anatomy of Peace. Harmondsworth, England: Penguin Books, 1947.
Revista Portuguesa de Filosofia, T. 29, Fasc. 3, Inâcio Monteiro (1724-1812): Évora - Coimbra - Ferrara (Jul. - Sep., 1973). "Back Matter."
Rhonheimer, Martin. Natur als Grundlage der Moral: die Personale Struktur des Naturgesetzes bei Thomas von Aquin. Innsbruck: Tyrolia-Verlag, 1987.
Rhonheimer, Martin. Natural Law and Practical Reason: A Thomist View of Moral Autonomy. New York: Fordham University. Press, 2000.
Rhonheimer, Martin. La Prospettiva della Morale. Rome: Armando Editore, 1994.
Rica, Alvaro de la. La Luz y La Mirada: Aproximación a la Autobiografía de Julien Green. Pamplona: Eunsa (Ediciones Universidad de Navarra, SA), 1993.
Rice, Charles E. Fifty Questions on the Natural Law: What It Is and Why We Need It. San Francisco: Ignatius Press, 1999.
Rice, Charles E. No Exception: A Pro-Life Imperative. Notre Dame, IN: Tyholland Press, 1990.
Riché, Pierre. Daily Life in the World of Charlemagne. Philadelphia: University of Pennsylvania Press, 1978.
Richard of Saint-Victor. Kirchberger, Clare, translator Richard of Saint-Victor: Selected Writings on Contemplation. New York: Harper and Brothers, 1957?.
Richard, Lucien, O.M.I. Is There a Christian Ethics?. New York: Paulist Press, 1975.
Richard, Timothée. Comment Étudier et Situer Saint Thomas. Paris: P. Lethielleux, 1938.
Richaud, Cardinal, Archevêque de Bordeaux. Dans les Chaînes du Christ. Paris: Bonne Presse, 1959.
Rickaby, John, S.J. General Metaphysics. Catholic Manuals of Philosophy. New York: Benziger Brothers, 1890.
Rickaby, John, S.J. The First Principles of Knowledge. Stonyhurst Philosophical Series. London: Longmans, Green, and Co., 1901.
Rickaby, Joseph, S.J. Moral Philosophy or Ethics and Natural Law. Stonyhurst Philosophical Series. London: Longmans, Green, and Co., 1903.
Rickaby, Joseph, S.J. Moral Philosophy: Ethics, Deontology and Natural Law. Stonyhurst Philosophical Series. London: Longmans, Green, and Co., 1918.
Rickard, Peter. A History of the French Language. London: Hutchinson University Library, 1974.
Ricoeur, Paul. Histoire et Vérité. Paris: Aux Éditions du Seuil, 1955.
Ricoeur, Paul. The Philosophy of Paul Ricoeur: An Anthology of His Work. Edited by Charles E. Reagan and David Stewart. Boston: Beacon Press, 1978.
Riga, Peter. Peace on Earth: A Commentary on Pope John's Encyclical. New York: Herder and Herder, 1964.
Rigau, Marian. Lugar y Espacio. Barcelona: Promociones Publicaciones Universitarias, 1986.
Rigobello, Armando. Il Futuro della Libertà. Roma: Edizioni Studium, 1978.
Riley, Patrick. Kant's Political Philosophy. Totowa, N.J.: Rowman and Littlefield, 1983.
Rilke, Rainer Maria. Die Aufzeichnungen des Malte Laurids Brigge. Frankfurt am Maim: Suhrkamp Verlag, 1910.
Rimaud, Jean. Thomisme et Méthode. Paris: Gabriel Beauchesne, Éditeur, 1925.
Riondato, Ezio. Ricerche di Filosofia Morale. Padova: Liviana Editrice, 1978.
Rischin, Moses, editor. Immigration and the American Tradition. Indianapolis: Bobbs-Merrill, 1976.
Rist, John M. Real Ethics: Rethinking the Foundations of Morality. Cambridge: Cambridge University Press, 2002.
Ritter, Joachim. Hegel and the French Revolution: Essays on the Philosophy of Right. Cambridge, MA: MIT Press, 1982.
Rivetti Barbò, Francesca. L'Antinomia del Mentitore: Da Peirce a Tarski. Milan: Edizioni Universitarie Jaca, 1986.
Rivetti Barbò, Francesca. Dialogo e Malinteso. Milan: Marzorati Editore, 1985.
Rivetti Barbò, Francesca. Dubbi, Discorsi, Verità: Lineamenti di Filosofia della Conoscenza. Milan: Edizioni Universitarie Jaca, 1985.
Rizzi, Anthony. The Science Before Science. Bloomington, IN: Institute for Advanced Physics Press, 2004.
Roberts, Tom Aerwyn. The Concept of Benevolence: Aspects of Eighteenth-century Moral Philosophy. London: Macmillan, 1973.
Robiglio, Andrea A. L'impossibile volere: Tommaso d'Aquino, i tomisti e la volontà. Milano: Vita e Pensiero Università, 2002.
Robinson, John A.T., bishop. The New Reformation. Philadelphia: The Westminster Press, 1965.
Roche, Paul. The Rat and the Convent Dove and Other Tales and Fables. Aldington, Kent, England: Hand and Flower Press, 1952.
Rodes, Robert E., Jr. Ecclesiastical Administration in Medieval England: The Anglo- Saxons to the Reformation. Notre Dame, IN: University of Notre Dame Press, 1977.
Rodriguez Cruz, Agueda Maria, O.P. Salmantica Docet: La Proyeccion de la Universidad de Salamanca en Hispanoamerica. Tomo I. Madrid: Universidad de Salamanca, 1977.
Rodriguez Rosado, Juan J., and Pedro Rodriguez Garcia, editors. Veritas et Sapientia: En el VII Centenario de Santo Tomás de Aquino. Pamplona, Spain: Ediciones Universidad de Navarra, 1975.
Roensch, Frederick J. Early Thomistic School. Dubuque, IA: The Priory Press. 1964.
Rogers, Eugene F., Jr. Thomas Aquinas and Karl Barth: Sacred Doctrine and the Natural Knowledge of God. Notre Dame, IN: University of Notre Dame Press, 1995.
Rogers, Stephen. Classical Greece and the Poetry of Chenier, Shelley, and Leopardi. Notre Dame, IN: University of Notre Dame Press, 1974.
Rogerson, J.W. Old Testament Criticism in the Nineteenth Century: England and Germany. Philadelphia: Fortress Press, 1985.
Rohof, Jan. La Sainteté Substantielle du Christ dans la Théologie Scholastique. Fribourg: Suisse Éditions St-Paul, 1952.
Roland-Gosselin, M.-D., O.P. Essai D'une Étude Critique de la Connaissance. Paris: Librairie Philosophique J. Vrin, 1932.
Roland-Gosselin, M.-D., O.P. Le De Ente et Essentia de S. Thomas D'Aquin. Paris: Librairie Philosophique J. Vrin, 1948.
Romanes, Ethel. The Story of Port Royal. London: John Murray, 1907.
Romano, Eugene, HBHJ. A Way of Desert Spirituality: The Rule of Life of the Hermits of Bethlehem of the Heart of Jesus. New York: Alba House, 1992.
Rome, Beatrice K. The Philosophy of Malebranche: a Study of his Integration of Faith, Readon, and Experimental Observation. Chicago: H. Regnery, 1963.
Rommen, Heinrich. Die Ewige Wiederkehr des Naturrechts. Munich: Hegner-Bucherei, Josef Kosel, 1947.
Rommen, Heinrich. The Natural Law: A Study in Legal and Social History and Philosophy. St. Louis: B. Herder Book Co., 1955.
Rommen, Henri (Heinrich). Le Droit Naturel: Histoire-Doctrine. Paris: Egloff, 1945.
Ronchi, Gabriella, editor. Marco Polo. Milano: Arnoldo Mondadori Editore, 1982.
Roques, René. Libres Sentiers vers l'Érigénisme. Rome: Edizioni dell'Ateneo, 1975.
Rorty, Amélie Oksenberg, editor. Essays on Descartes' Meditations. Berkeley, CA.: University of California Press, 1986.
Rorty, James and Moshe Decter. McCarthy and the Communists. Boston: Beacon Press, 1954.
Rose, ** Mike. Why School: Reclaiming Education for All of Us. London: The New Press, 2009.
Rosen, Stanley. Plato's Sophist: The Drama of Original and Image. New Haven, CT.: Yale University Press, 1983.
Rosen, Stanley. Plato's Symposium. New Haven, CT: Yale University Press, 1968.
Rosenbaum, Alan S., editor. The Philosophy of Human Rights: International Perspectives. Westport, CT.: Greenwood Press, 1980.
Rosenstock-Huessy, Eugen. The Christian Future or the Modern Mind Outrun. London: S.C.M. Press, 1947.
Rosenstock-Huessy, Eugen. The Driving Power of Western Civilization: The Christian Revolution of the Middle Ages. Boston: Beacon Press, 1949.
Rosmini, Antonio. Anthropology as an Aid to Moral Science. Durham, England: Rosmini House, 1991.
Rosmini, Antonio. Conscience. Durham, England: Rosmini House, 1989.
Rosmini, Antonio. Certainty. Durham, England: Rosmini House, 1991.
Rosmini, Antonio. The Origin of Thought. Durham, England: Rosmini House, 1987.
Rosmini, Antonio. Principles of Ethics. Durham, England: Rosmini House, 1988.
Rosponi, Cristiano, Giampaolo Rossi, and Duncan G. Stroik, editors. Riconquistare lo Spazio Sacro: la Chiesa nella Città del Terzo Millennio. (Reconquering Sacred Space: the Church in the City of the Third Millennium). Roma: Editrice Il Bosco e la Nave, 2000.
Ross, Gregory A. Grounds for Grammar. Washington: University Press of America, 1977.
Ross, J. Elliot. Ethics: From the Standpoint of Scholastic Philosophy. New York: Devin- Adair Co., 1938.
Ross, James F. Portraying Analogy. Cambridge and New York: Cambridge University Press, 1981 & 2002.
Ross, Stephen David. Metaphysical Aporia and Philosophical Heresy. Albany, N.Y.: State University of New York Press, 1989.
Ross, W. D. Aristotle's Prior and Posterior Analytics. Oxford: Clarendon Press, 1957.
Rotenstreich, Nathan. Reflection and Action. Dordrecht and Boston: Martinus Nijhoff, 1985.
Roth, Norman. Maimonides: Essays and Texts: 850th Anniversary. Madison: Hispanic Seminary of Medieval Studies, 1985.
Roubier, Paul. Théorie Générale du Droit: Histoire des Doctrines Juridiques et Philosophie des Valeurs Sociales. Paris: Librairie du Recueil Sirey, 1946.
Rouët de Journel, Marie Joseph. Enchiridion Patristicum: loci ss. patrum, doctorum scriptorum ecclesiasticorum. Editio undevicesima. Friburgi Brisgoviae: Herder, 1956.
Rougemont, Denis de. Politique de la Personne. Paris: Éditions "Je Sers", 1946.
Rourke, Thomas R. A Conscience as Large as the World: Yves R. Simon versus the Catholic Neoconservatives. Lanham, MD: Rowman and Littlefield, 1997.
Rouse, Mary A., and Richard H. Rouse. Authentic Witnesses: Approaches to Medieval Texts and Manuscripts. Notre Dame, IN: University of Notre Dame Press, 1990.
Rouse, Richard H., and Mary A. Rouse. Preachers, Florilegia and Sermons: Studies on the Manipulus Florum of Thomas of Ireland. Toronto: Pontifical Institute of Mediaeval Studies, 1979.
Rousseau, Félicien. La Croissance Solidaire des Droits de L'Homme. Tournai: Desclée & Cie, 1982.
Rousseau, Jean-Jacques. On the Social Contract. Indianapolis, IN: Hackett Publishing Co., 1987.
Rousselot, Pierre. Gli occhi della Fede. Milano: Jaca Book, 1977.
Rousselot, Pierre, S.J. L'Intellectualisme de Saint Thomas. Paris: Gabriel Beauchene, 1924.
Rousselot, Pierre. The Intellectualism of Saint Thomas. New York: Sheed & Ward, 1935.
Rovighi, Sofia Vanni. Introduzione a Tommaso d'Aquino. Rome: Editori Laterza, 1996.
Rowe, William L. The Cosmological Argument. Princeton: Princeton University Press, 1975.
Roy, James Charles. Islands of Storm. Chester Springs, PA.: Dufour Editions, 1991.
Royal Institute of Philosophy Lectures. Volume One, 1966-1967. The Human Agent. New York: St. Martin's Press, 1968.
Royce, Josiah. The Philosophy of Josiah Royce. Editor and introduction by John K. Roth. New York: Thomas Y. Crowell Co., 1971.
Rudavsky, Tamar, editor. Divine Omniscience and Omnipotence in Medieval Philosophy: Islamic, Jewish and Christian Perspectives. Dordrecht, the Netherlands: D. Reidel Publishing Co., 1985.
Rudowski, Victor Anthony. Lessing's Aesthetica in Nuce: An Analysis of the May 26, 1769 Letter to Nicolai. Chapel Hill: University of North Carolina Press, 1971.
Ruelio, Francis. La Notion de Vérité Chez Saint Albert le Grand et Saint Thomas d'Aquin de 1243 à 1254. Louvain: Éditions Nauwelaerts, 1969.
Ruet, Noel. Le Bouquet du Sang. Loiret, France: Les Cahiers de Rochefort, 1958.
Ruffin, C. Bernard. The Life of Brother André: The Miracle Worker of St. Joseph. Huntington, IN: Our Sunday Visitor, 1988.
Ruggier, Joe. Intelligible Mystery: A Brief Study of the Poetry of Rex Hudson. Superior, WI: Arrohead, 1984.
Ruggiu, Luigi. Tempo Cosciencza e Essere nella Filosofia di Aristotele: Saggio sulle Origini del Nichilismo. Brescia: Paideia, 1970.
Ruini, Camillo. La Trascendenza della Grazia nella Teologia di San Tommaso d'Aquino. Rome: Università Gregoriana Editrice, 1971.
Runes, Dabogert D., editor. Who's Who in Philosophy, Vol. 1: Anglo-American Philosophers. New York: Philosophical Library, 1942.
Ruse, Michael, editor. Philosophy of Biology. New York: Macmillan Co., 1989.
Russell, Jeffrey Burton. Lucifer: the Devil in the Middle Ages. Ithaca, NY: Cornell University Press, 1984.
Russell, Jeffrey Burton. Medieval Civilization. New York: John Wiley and Sons, 1968.
Russell, Robert J., William R. Stoeger, and G.V. Coyne, editors. Physics, Philosophy, and Theology: a Common Quest for Understanding. Vatican City: Vatican Observatory, 1988.
Russier, Jeanne. Sagesse Cartésienne et Religion: Essay sur la Connaissance de l'Immortalité de l'âme. Paris: Presses Universitaires de France, 1958.
Rutherford, Donald. Leibniz and the Rational Order of Nature. Cambridge; New York: Cambridge University Press, 1995.
Rutkiewicz, Bohdan. L'Individualisation, l'Evolution et le Finalisme Biologique. Paris: Librairie Philosophique J. Vrin, 1933.
Rutler, George William. The Seven Wonders of the World: Meditations on the Last Words of Christ. San Francisco: Ignatius Press, 1993.
Ruysbroeck, Jan van. The Adornment of the Spiritual Marriage: The Book of Truth and the Sparkling Stone. London: John M. Watkins, 1951.
Ruysbroek, Jan van. Oeuvres de Ruysbroeck L'Admirable, Vols. IV, V, VI. Brussels: Vromant and Co., 1928.
Ruysbroek, Jan van. The Chastising of God's Children and the Treatise of Perfection of the Sons of God. Oxford: Basil Blackwell, 1957.
Ruysbroek, Jan van. The Spiritual Espousals. London: Faber and Faber, 1952.
Ruyssen, Théodore. Kant. Paris: Librairie Félix Alcan, 1929.
Ryan, Alan. The Philosophy of Social Explanation. London: Oxford University Press, 1973.
Ryan, Eugene E. Aristotle's Theory of Rhetorical Argumentation. Montréal: Bellarmin, 1984.
Ryan, John K., editor. Studies in Philosophy and the History of Philosophy Vol. 1. Washington, D.C.: Catholic University of America Press, 1961.
Ryan, John K., editor. Studies in Philosophy and the History of Philosophy Vol. 2. Washington, D.C.: Catholic University of America Press, 1963.
Ryan, John K., editor. Studies in Philosophy and the History of Philosophy Vol. 4. Washington, D.C.: Catholic University of America Press, 1969.
Ryan, John K., editor. Studies in Philosophy and the History of Philosophy Vol. 5: Ancients and Moderns. Washington, D.C.: Catholic University of America Press, 1970.
Ryan, Thomas R., C.PP.S. Orestes A. Brownson: A Definitive Biography. Huntington, IN: Our Sunday Visitor, 1976.