# Friedrich Umber
**Wikidata**: [Q55896259](https://www.wikidata.org/wiki/Q55896259)  
**Source**: https://4ort.xyz/entity/friedrich-umber


## References

1. Integrated Authority File
2. Czech National Authority Database
3. Catalog of the German National Library
4. Deutsche Biographie
5. NUKAT
6. Alvin
7. Virtual International Authority File