Petrus, Cantor, approximately 1130–1197: Super Vnum ex quatuor [Latin]
- Bibliography:
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- Stegmüller, Bibl. 6504
- Unpr.
- Manuscripts:
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- Merton College MS. 212 — S. XIII1; script of French appearance.
The above references reflect only the current coverage of the online catalogue and may not be comprehensive.