Petrus apostolus dixit

Source: 
Worcester, Cathedral - Music Library, F.160 (olim 1247) (with hymnal)
Folio: 
228r
Sequence: 
2
Feast: 
Petri, Pauli
Office/Mass: 
M
Genre: 
A
Position: 
1.3
Cantus ID: 
004283
Mode: 
3
Differentia: 
1a
Differentia database: 
1--k-k-kj-hj-hG-g--4 101i
Addendum: 
P: 326