History - Propter veritatem
Oct 02, 2015 (Motchipou)
Added ref. to 1961 - The Liber Usualis (Solesmes), pp. 1676-1677
sources
[{"chant_id":"807","source":"2","page":"620","sequence":"1","extent":"1"},{"chant_id":"807","source":"3","page":"1676","sequence":"1","extent":"2"}]