Proceedings of the Sixth International Congress of Medieval Canon Law : Berkeley, California, 28 July-2 August 1980 / edited by Stephan Kuttner and Kenneth Pennington. - International Congress of Medieval Canon Law (6th : 1980 : Berkeley, Ca.). (OLS)http://pul/name/9783; Pennington, Kenneth. (OLS)http://pul/name/9778; Kuttner, Stephan, 1907-1996. (OLS)http://pul/name/4845 (Biblioteca Apostolica Vaticana, 1985)