# Liber Usualis

> Book of commonly used Gregorian chants

**Wikidata**: [Q733357](https://www.wikidata.org/wiki/Q733357)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Liber_Usualis)  
**Source**: https://4ort.xyz/entity/liber-usualis


## References

1. Freebase Data Dumps. 2013
2. MusicBrainz