# Hélène Cals

> Dutch opera singer (1901-1937)

**Wikidata**: [Q63486226](https://www.wikidata.org/wiki/Q63486226)  
**Source**: https://4ort.xyz/entity/h-l-ne-cals


## References

1. [Source](https://operanederland.nl/2014/05/13/helden-en-heldinnen-van-opera-nederland-tot-1939-9/)
2. [Source](https://operanederland.nl/2014/06/13/helden-en-heldinnen-van-opera-nederland-tot-1939-10/)
3. [Source](http://www.fembio.org/biographie.php/frau/frauendatenbank?fem_id=5022)