Petrus autem servabatur in

Source: 
Aosta, Seminario Maggiore - Biblioteca, 6
Folio: 
073r
Sequence: 
1
Feast: 
Petri
Office/Mass: 
M
Genre: 
A
Position: 
3.1
Cantus ID: 
004286
Mode: 
1
Differentia: 
G5
Differentia database: 
1--h-h-g-f-g-ghg--4 66l