Avertantur retrorsum et

Source: 
Worcester, Cathedral - Music Library, F.160 (olim 1247) (with hymnal)
Folio: 
059r
Sequence: 
1
Feast: 
Fer. 5 in Cena Dom.
Office/Mass: 
M
Genre: 
A
Position: 
1.2
Cantus ID: 
001547
Mode: 
8
Differentia: 
2a
Differentia database: 
1--k-k-h-k-l-k--4 99d
Addendum: 
P: 118