History - In me gratia
Oct 02, 2015 (Motchipou)
Added ref. to 1961 - The Liber Usualis (Solesmes), pp. 1676B-1677
sources
[{"chant_id":"494","source":"2","page":"621","sequence":"1","extent":"2"},{"chant_id":"494","source":"3","page":"1676B","sequence":"1","extent":"2"}]