History - Beatus servus
Nov 09, 2015 (Motchipou)
Added Source: "1961 - The Liber Usualis (Solesmes)" p. 1203
sources
[{"chant_id":"1154","source":"2","page":"[45]","sequence":"1","extent":"1"},{"chant_id":"1154","source":"3","page":"1203","sequence":"2","extent":"1"}]