In medio ecclesiae aperuit os

Source: 
Valenciennes, Bibliothèque municipale, 114
Folio: 
072r
Sequence: 
11
Feast: 
De Sanctis TP
Office/Mass: 
V
Genre: 
A
Position: 
3M
Cantus ID: 
003256
Mode: 
8
Differentia: 
1
Differentia database: 
1--k-k-j-k-h-g--4 118a