Et in virtute tua libera

Source: 
Paris, Bibliothèque nationale de France - Département des Manuscrits, Latin 12601
Folio: 
012r
Sequence: 
8
Feast: 
Fer. 3 in estate
Office/Mass: 
M
Genre: 
V
Position: 
01
Cantus ID: 
006421a
Mode: 
r