O Gabriel annuntiator fortis

Source: 
Benevento, Archivio Capitolare, V 19
Folio: 
121v
Sequence: 
6
Feast: 
Antiphonae Majores
Office/Mass: 
V
Genre: 
A
Position: 
9M
Cantus ID: 
004028
Mode: 
2
Differentia: 
2
Differentia database: 
1--f-f-ed-fe-cd-d--4 156b