# Karl Franz Siegen
**Wikidata**: [Q94853183](https://www.wikidata.org/wiki/Q94853183)  
**Source**: https://4ort.xyz/entity/karl-franz-siegen


## References

1. Catalog of the German National Library
2. Virtual International Authority File
3. CERL Thesaurus
4. [LIBRIS. 2018](https://libris.kb.se/53hlrsqp21rc1j5)