Avertantur retrorsum et

Source: 
Arras, Bibliothèque municipale, 893 (olim 465)
Folio: 
148v
Sequence: 
5
Feast: 
Fer. 5 in Cena Dom.
Office/Mass: 
M
Genre: 
A
Position: 
1.2
Cantus ID: 
001547
Mode: 
8
Differentia: 
2
Differentia database: 
1--k-k-h-k-l-k--4 99d