Aperiens Petrus os suum dixit

Source: 
Rouen, Bibliothèque municipale, 248 (olim A. 339)
Folio: 
039r
Sequence: 
1
Feast: 
Petri, Pauli
Office/Mass: 
M
Genre: 
A
Position: 
2.2
Cantus ID: 
001445
Mode: 
8
Differentia: 
G1
Differentia database: 
1--k-k-j-k-h-g--4 118a