1. Columbia University Rare Book & Manuscript Library, MS Or 10 DS ID: DS6597 Title: Bīst dar maʻrifat-i usṭurlāb Author: Nasir al-Din al-Tusi Place: Iran Date: 1299.
2. Princeton University, Islamic Manuscripts Third Series no. 235 DS ID: DS13199 Title: Fārsī-i hayʾat Author: Nasir al-Din al-Tusi Date: 1627