History - Postula a me
Oct 10, 2019 (nokel81)
Added Liber Usualis as source
sources
[{"chant_id":"390","source":"2","page":"642","sequence":"1","extent":"1"},{"chant_id":"390","source":"3","page":"1713","sequence":"1","extent":"1"},{"chant_id":"390","source":"4","page":"390","sequence":"21","extent":"1"}]