Ego sum qui testimonium

Source: 
Montecassino, Monumento Nazionale di Montecassino - Biblioteca, 542
Folio: 
163
Sequence: 
7
Feast: 
Dom. de Passione
Office/Mass: 
V
Genre: 
A
Position: 
M
Cantus ID: 
002600
Mode: 
8
Differentia: 
C
Differentia database: 
1--k-k-jh-jk-hhh-g--4 170b