History - O lux beata Caelitum
Feb 07, 2021 (xmarteo)
Removed LH83 as a source because this does not have rhythmic signs.
sources
[{"chant_id":"4253","source":"6","page":"63","sequence":"0","extent":"1"},{"chant_id":"4253","source":"15","page":"26","sequence":"0","extent":"1"}]