History - Illumina
Feb 28, 2022 (fkchaud)
Adding Graduale Romanum 1974 as a source
sources
[{"chant_id":"708","source":"2","page":"331","sequence":"2","extent":"2"},{"chant_id":"708","source":"3","page":"1000","sequence":"21","extent":"2"},{"chant_id":"708","source":"4","page":"290","sequence":"1","extent":"1"}]