History - Passer invenit
Feb 27, 2022 (fkchaud)
Adding Graduale Romanum, Solesmes (1974) as a source
sources
[{"chant_id":"1090","source":"2","page":"126","sequence":"2","extent":"2"},{"chant_id":"1090","source":"3","page":"556","sequence":"21","extent":"1"},{"chant_id":"1090","source":"4","page":"306","sequence":"1","extent":"2"}]