Posuit os meum dominus ut

Source: 
Oxford, Bodleian Library, MS. Canon. Liturg. 202 (olim 19314)
Folio: 
091v
Sequence: 
2
Feast: 
Joannis Baptistae
Office/Mass: 
M
Genre: 
A
Position: 
3.1
Cantus ID: 
004345
Mode: 
?
Differentia: 
*