# Heinrich Zipfel
**Wikidata**: [Q55910791](https://www.wikidata.org/wiki/Q55910791)  
**Source**: https://4ort.xyz/entity/heinrich-zipfel


## References

1. Integrated Authority File
2. CERL Thesaurus
3. Catalog of the German National Library
4. MAK
5. [Source](http://thesaurus.cerl.org/record/cnp00263872)