History - Agnus XVII
Feb 16, 2021 (mapacali)
Added Graduale Romanum 1974 as source
sources
[{"chant_id":"1137","source":"2","page":"57*","sequence":"1","extent":"1"},{"chant_id":"1137","source":"3","page":"61","sequence":"3","extent":"2"},{"chant_id":"1137","source":"4","page":"766","sequence":"1","extent":"1"},{"chant_id":"1137","source":"5","page":"43","sequence":"1","extent":"1"}]