Ubi duo vel tres congregati

Source: 
Roma, Biblioteca Vallicelliana, C.5
Folio: 
126r
Sequence: 
4
Feast: 
Fer. 3 Hebd. 3 Quad.
Office/Mass: 
P
Genre: 
A
Cantus ID: 
005258
Mode: 
4
Differentia: 
1
Differentia database: 
1--h-g-h-j-g-e--4 27a