Missus est Gabriel angelus ad

Source: 
Firenze (Florence), Arcivescovado - Biblioteca, s.c.
Folio: 
002v
Sequence: 
9
Feast: 
Dom. 1 Adventus
Office/Mass: 
E
Genre: 
A
Position: 
1
Cantus ID: 
003794
Mode: 
8
Differentia: 
3
Differentia database: 
1--k-k-j-k-h-ghg--4 120a