1011. Free Library of Philadelphia, Lewis E M 66:13-14 Title: Gradual Place: Flanders Date: 1490-1510
1012. Free Library of Philadelphia, Lewis E M 66:15-16 Title: Antiphonary Place: Limbourg Date: 1500-1599
1013. Free Library of Philadelphia, Lewis E M 66:16a Title: Wheel of sevens Place: France Date: 1200-1299
1015. Free Library of Philadelphia, Lewis E M 66:18 Title: Antiphonary Place: Germany Date: 1300-1399