O Thoma didyme per Christum

Folio: 
023r
Sequence: 
1
Office/Mass: 
V
Genre: 
A
Position: 
10M
Cantus ID: 
004083
Mode: 
2
Differentia: 
D1a
Extra: 
012r
Indexing notes: 
The foliation... | The foliation showing this as "23" is visible on the microfilm towards the centre of the top margin.