Roma en la concepción de San agustín y San León Magno - Oroz Reta, José (Papers presented to the Fourth International Conference on Patristic Studies held at Christ Church, Oxford 1963, 3. Classica, philosophica et ethica, theologica, Augustiniana, post-patristica (Geschichte der altchristlichen Literatur, 94. Studia Patristica, 9)., 1966)