Opem nobis o Thoma porrige

Source: 
Mainz, Bischöfliches Dom- und Diözesanmuseum, A
Folio: 
161v
Sequence: 
4
Feast: 
Thomae Cant.
Office/Mass: 
L
Genre: 
A
Position: 
B
Cantus ID: 
203689
Mode: 
6T
Differentia: 
1
Differentia database: 
1--m-m-k-lm-l-k--4 T7aA
Extra: 
124