# Karl Wetzel
**Wikidata**: [Q28933090](https://www.wikidata.org/wiki/Q28933090)  
**Source**: https://4ort.xyz/entity/karl-wetzel-q28933090


## References

1. Catalog of the German National Library
2. Integrated Authority File
3. Czech National Authority Database
4. [Source](http://research.uni-leipzig.de/catalogus-professorum-lipsiensium/leipzig/Wetzel_557/)
5. Virtual International Authority File