1. Columbia University Rare Book & Manuscript Library, MS X893 M8553 DS ID: DS18626 Title: Sefer Yeẓirah Author: Nahmanides Place: undetermined Date: 16--
2. Columbia University Rare Book & Manuscript Library, MS X893 M8553 DS ID: DS18627 Title: Sefer Yeẓirah Author: Nahmanides Place: undetermined Date: 16--