History - Deus deorum
Feb 03, 2021 (rleduc)
Single chant appears twice in same source (two options for Nocturn III on Wednesdays)
sources
[{"chant_id":"8273","source":"23","page":"57","sequence":"1","extent":"1"},{"chant_id":"8273","source":"23","page":"61","sequence":"1","extent":"1"}]