History - Ipsi soli servo

Feb 11, 2021 (SirPL)

Added reference to Les Heures Gregoriennes

sources
[{"chant_id":"14295","source":"19","page":"8","sequence":"3","extent":"2"},{"chant_id":"14295","source":"29","page":"14","sequence":"2","extent":"1"},{"chant_id":"14295","source":"29","page":"20","sequence":"1","extent":"1"}]