# Jo Estill

> American singer, singing voice specialist and voice researcher (1921-2010)

**Wikidata**: [Q6204221](https://www.wikidata.org/wiki/Q6204221)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Jo_Estill)  
**Source**: https://4ort.xyz/entity/jo-estill


## References

1. Czech National Authority Database
2. Virtual International Authority File