RT Article T1 The evolution of Gratian's Tractatus de penitentia JF Bulletin of medieval canon law VO 26 SP 59 OP 123 A1 Larson, Atria A. LA English PB The Catholic University of America Press for the Stephan Kuttner Institute of Medieval Canon Law YR 2004 UL https://www.ixtheo.de/Record/1650514808 K1 Gratianus : de Clusio : -1158 : Decretum K1 Gratianus : de Clusio : -1158 : Tractatus de penitentia K1 Rechtsquellengeschichte, kirchliche