History - Justitiae Domini
Feb 27, 2022 (fkchaud)
Adding Graduale Romanum 1974 as a source
sources
[{"chant_id":"591","source":"2","page":"126","sequence":"1","extent":"1"},{"chant_id":"591","source":"3","page":"555","sequence":"21","extent":"2"},{"chant_id":"591","source":"4","page":"309","sequence":"1","extent":"1"}]