1. Free Library of Philadelphia, Lewis E 244 Title: Infortiatum Author: Justinian I and Accursius Place: Bologna Date: 1270-1280
2. Free Library of Philadelphia, Lewis E M 26:1 Title: Corpus iuris civilis Place: Bologna Date: 1250-1299
3. Free Library of Philadelphia, Lewis E M 26:4-5 Title: Legal treatise Place: Bologna Date: 1300-1325
6. Free Library of Philadelphia, Lewis E M 48:12-13 Title: Corpus iuris civilis Place: Bologna Date: 1290-1310