1. University of Pennsylvania, LJS 286 DS ID: DS604 Title: Taḥrīr Uṣūl al-handasah wa-al-ḥisāb Author: Nasir al-Din al-Tusi Date: A.H. 890 (1485)
2. Princeton University, Islamic Manuscripts Garrett no. 987H DS ID: DS2331 Title: Tajrīd al-ʻaqāʼid Author: Nasir al-Din al-Tusi Date: 1461?