1. Free Library of Philadelphia, Lewis E M 73:5 DS ID: DS5688 Title: Gradual Place: PerugiaRomeItaly Date: 1500-1550
2. Free Library of Philadelphia, Lewis E M 73:10-13 DS ID: DS5691 Title: Gradual Place: Rome and Italy Date: 1285-1299
3. Free Library of Philadelphia, Lewis E M 73:15-20 DS ID: DS5693 Title: Gradual Place: Rome and Italy Date: 1285-1299