# Hans Koopmann
**Wikidata**: [Q94757697](https://www.wikidata.org/wiki/Q94757697)  
**Source**: https://4ort.xyz/entity/hans-koopmann


## References

1. [Source](https://ediss.sub.uni-hamburg.de/handle/ediss/3074)
2. Catalog of the German National Library
3. [Source](https://kalliope-verbund.info/DE-611-BF-100802)