# Luise Helletsgruber

> Austrian opera singer (1901-1967)

**Wikidata**: [Q25939193](https://www.wikidata.org/wiki/Q25939193)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Luise_Helletsgruber)  
**Source**: https://4ort.xyz/entity/luise-helletsgruber


## References

1. [BnF authorities](https://catalogue.bnf.fr/ark:/12148/cb138951129)
2. general catalog of BnF
3. MusicBrainz
4. Virtual International Authority File
5. CiNii Research
6. BnF authorities
7. National Library of Israel Names and Subjects Authority File
8. [Source](http://www.musiklexikon.ac.at/ml/ml-beacon.txt)