31. Free Library of Philadelphia, Lewis E M 42:12-13 Title: Antiphonary Place: Regensburg Date: 1300-1325
33. Free Library of Philadelphia, Lewis E M 42:16B Title: Antiphonary Place: Flanders Date: 1300-1325
37. Free Library of Philadelphia, Lewis E M 46:3a-c Title: Antiphonary Place: Florence Date: 1250-1299