# Karl August Herzfeld
**Wikidata**: [Q60623818](https://www.wikidata.org/wiki/Q60623818)  
**Source**: https://4ort.xyz/entity/karl-august-herzfeld


## References

1. Czech National Authority Database
2. Catalog of the German National Library
3. [Source](https://www.biographien.ac.at/oebl/oebl_H/Herzfeld_Karl-August_1861_1926.xml)
4. NUKAT
5. [Österreichisches Biographisches Lexikon 1815–1950](https://www.biographien.ac.at/oebl/oebl_H/Herzfeld_Karl-August_1861_1926.xml)