History - Dilexit Andream

Sep 29, 2019 (nokel81)

Added Liber Usualis as source

sources
[{"chant_id":"984","source":"2","page":"393","sequence":"2","extent":"2"},{"chant_id":"984","source":"3","page":"1305","sequence":"1","extent":"1"},{"chant_id":"984","source":"3","page":"1520","sequence":"1","extent":"1"}]