1. Boston Public Library, MS pb Med.180 Title: Single leaf from a 15th-century gradual : in Latin]. Author: Catholic Church Place: Italy Date: between 1450 and 1499
2. Boston Public Library, MS pb Med.190 Title: Single leaf from a 15th-century gradual : in Latin]. Author: Catholic Church Place: Italy Date: between 1400 and 1450
3. Boston Public Library, MS pb Med.223 Title: Single leaf from a 15th-century gradual : in Latin]. Author: Catholic Church Place: Italy Date: between 1450 and 1499