1. Free Library of Philadelphia, Lewis E 220 DS ID: DS4565 Title: Gradual Place: Siena and Italy Date: 1485-1499
2. Free Library of Philadelphia, Lewis E 226 DS ID: DS4569 Title: Gradual Place: Belém and Portugal Date: 1540-1560
3. Free Library of Philadelphia, Lewis E 229 DS ID: DS4570 Title: Gradual Place: Belém and Portugal Date: 1540-1560