History - Tollite portas
Oct 30, 2018 (SirPL)
Added reference to Graduale Romanum 1974
sources
[{"chant_id":"756","source":"2","page":"9","sequence":"2","extent":"2"},{"chant_id":"756","source":"3","page":"1269","sequence":"2","extent":"2"},{"chant_id":"756","source":"4","page":"25","sequence":"1","extent":"1"}]