# Bertha Schwarz

> German/Austrian operatic soprano (1855–1947)

**Wikidata**: [Q72664](https://www.wikidata.org/wiki/Q72664)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Bertha_Schwarz)  
**Source**: https://4ort.xyz/entity/bertha-schwarz


## References

1. Integrated Authority File
2. Archivio Storico Ricordi
3. BnF authorities
4. [Source](http://viaf.org/viaf/data/viaf-20170101-links.txt.gz)
5. SNAC
6. Salzburgwiki
7. Freebase Data Dumps. 2013
8. [Source](https://mix-n-match.toolforge.org/#/entry/63766097)