Felix namque es beata virgo

Source: 
Cambridge, University Library, Mm.ii.9
Folio: 
524
Sequence: 
1
Feast: 
Nativitas Mariae
Office/Mass: 
M
Genre: 
A
Position: 
3.3
Cantus ID: 
002860
Mode: 
4
Differentia: 
1
Differentia database: 
1--h-g-h-jh-gfe-e--4 19b
Extra: 
29