Unus autem ex illis ut

Source: 
Arras, Bibliothèque municipale, 893 (olim 465)
Folio: 
237v
Sequence: 
1
Feast: 
Dom. 15 p. Pent.
Office/Mass: 
E
Genre: 
A
Position: 
2
Cantus ID: 
005276
Mode: 
1
Differentia: 
12
Differentia database: 
1--h-h-hg-f-g-gfed--4 75a