History - Tu es Petrus (Graduale)
Sep 09, 2019 (nokel81)
Added Liber Usualis as source
sources
[{"chant_id":"1234","source":"2","page":"411","sequence":"2","extent":"2"},{"chant_id":"1234","source":"3","page":"1333","sequence":"1","extent":"2"}]
Added Liber Usualis as source
sources
[{"chant_id":"1234","source":"2","page":"411","sequence":"2","extent":"2"},{"chant_id":"1234","source":"3","page":"1333","sequence":"1","extent":"2"}]