Robertus, Anglicus, active 1272 at Montpellier: Tractatus quadrantis veteris [Latin]
- Manuscripts:
-
- MS. Ashmole 1522 (Selected pages online) — 14th century, first half; England or France
- MS. Canon. Ital. 157 — Composite manuscript
The above references reflect only the current coverage of the online catalogue and may not be comprehensive.