# Karl Koeppner
**Wikidata**: [Q60815943](https://www.wikidata.org/wiki/Q60815943)  
**Source**: https://4ort.xyz/entity/karl-koeppner


## References

1. Catalog of the German National Library
2. [Source](https://www.biographien.ac.at/oebl/oebl_K/Koeppner_Karl_1871_1933.xml)
3. Czech National Authority Database