O virgo virginum quomodo fiet

Source: 
Tours, Bibliothèque municipale, 149
Folio: 
054v
Sequence: 
3
Feast: 
Antiphonae Majores
Office/Mass: 
V
Genre: 
A
Position: 
8M
Cantus ID: 
004091
Mode: 
2
Differentia: 
1c
Differentia database: 
1--f-f-f-e-c-d--4 152b