History - Meditabor
Feb 28, 2022 (fkchaud)
Added Graduale Romanum 1974 as a source
sources
[{"chant_id":"810","source":"2","page":"114","sequence":"1","extent":"1"},{"chant_id":"810","source":"3","page":"548","sequence":"21","extent":"2"},{"chant_id":"810","source":"4","page":"356","sequence":"1","extent":"1"}]