History - Jerusalem quae

Feb 28, 2022 (fkchaud)

Adding Graduale Romanum 1974 as a source

sources
[{"chant_id":"1353","source":"2","page":"141","sequence":"1","extent":"1"},{"chant_id":"1353","source":"3","page":"563","sequence":"1","extent":"1"},{"chant_id":"1353","source":"4","page":"370","sequence":"2","extent":"1"}]