RT Article T1 'New' and 'old' law in the twelfth century: a contribution to the current debate JF Bulletin of medieval canon law VO 36 SP 299 OP 314 A1 Duggan, Anne 1939- LA English YR 2019 UL https://ixtheo.de/Record/1728080398 DO 10.1353/bmc.2019.0012