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. University of California, Berkeley, BANC MS UCB 79 DS ID: DS12647 Title: Elements Author: Euclid Place: Italy Date: approxmately 1460