# Karl Schmidtgen
**Wikidata**: [Q94896341](https://www.wikidata.org/wiki/Q94896341)  
**Source**: https://4ort.xyz/entity/karl-schmidtgen


## References

1. Catalog of the German National Library
2. Source
3. Integrated Authority File
4. [Source](http://kalliope-verbund.info/DE-611-BF-38343)
5. [Source](https://kalliope-verbund.info/DE-611-BF-13002)