# Karl Haehnel
**Wikidata**: [Q95265241](https://www.wikidata.org/wiki/Q95265241)  
**Source**: https://4ort.xyz/entity/karl-haehnel


## References

1. [Collection of Registry Books at Prague State Archive](https://ebadatelna.soapraha.cz/d/13119/196#)
2. Biographical Dictionary of the History of the Czech Lands
3. [Collection of Registry Books at Prague City Archives](http://katalog.ahmp.cz/pragapublica/permalink?xid=0B01EB902439491EA0AB742AC0FDA48E&scan=138#scan138)
4. Czech National Authority Database
5. Catalog of the German National Library
6. Virtual International Authority File
7. CiNii Research