Proceedings of the Fourth International Congress of Medieval Canon Law : Toronto, 21-25 August 1972 / edited by Stephan Kuttner. - International Congress of Medieval Canon Law (4th : 1972 : Toronto). (OLS)http://pul/name/9648; Kuttner, Stephan, 1907-1996. (OLS)http://pul/name/4845 (Biblioteca Apostolica Vaticana, 1976)