History - Confitemini... quoniam
Apr 04, 2026 (JFranAnello)
Added Graduale Romanum 1974 Source.
sources
[{"chant_id":"507","source":"2","page":"239L","sequence":"1","extent":"1"},{"chant_id":"507","source":"3","page":"776II","sequence":"1","extent":"1"},{"chant_id":"507","source":"4","page":"191","sequence":"1","extent":"2"}]