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A Lexicon of Saint Thomas Aquinas based on the Summa Theologica and Selected Passages of his Other Works is unavailable, but you can change that!

Dr. Deferrari brings his experience as a professor of Latin and Greek at the Catholic University of America to bear in this one-of-a-kind work. With the assistance of Sister M. Inviolata Barry and Ignatius McGuiness, OP, Dr. Deferrari analyzes every word in St. Thomas’ Summa Theologica. The work also includes analyses of words from other works of St. Thomas where helpful in filling out St....