1. University of Kansas, MS C189 Title: Philosophy Author: Porphyry and Aristotle Place: Italy Date: [between 1301 and 1400]
2. University of Pennsylvania, Ms. Codex 765 Title: Organon Author: Aristotle Place: Italy Date: [between 1450 and 1499]
3. Free Library of Philadelphia, Lewis E 15 Title: Organon Author: Aristotle Place: Italy Date: 1285-1299