1. University of Pennsylvania, LJS 462 Title: Algorismus Author: Alexander of Villedieu Place: Spain Date: [between 1300 and 1350]
3. University of Pennsylvania, Ms. Codex 918 Title: Regulae Author: Theobaldus Episcopus Place: Northern Italy Date: [1200?]
4. Boston Public Library, MS q Med.20 Title: Astronomica Author: Marcus Manilius Place: Ferrara Date: 1461.