# Karl Biefel
**Wikidata**: [Q95140920](https://www.wikidata.org/wiki/Q95140920)  
**Source**: https://4ort.xyz/entity/karl-biefel


## References

1. Czech National Authority Database
2. archINFORM
3. Integrated Authority File
4. Virtual International Authority File
5. Artists of the World Online
6. [archINFORM](https://www.archinform.net/service/wd_aiarch.php)
7. Bibliography of the History of the Czech Lands