# Isolde Luise Helene Freifrau von Ungern-Sternberg
**Wikidata**: [Q94904100](https://www.wikidata.org/wiki/Q94904100)  
**Source**: https://4ort.xyz/entity/isolde-luise-helene-freifrau-von-ungern-sternberg


## References

1. Catalog of the German National Library