Iste est discupulis qui

Source: 
Roma, Biblioteca Vallicelliana, C.5
Folio: 
042v
Sequence: 
9
Feast: 
Joannis Evang.
Office/Mass: 
V2
Genre: 
A
Position: 
M
Cantus ID: 
003421
Mode: 
2
Differentia: 
1
Differentia database: 
1--f-f-f-ed-cd-d--4 153e