# Friedrich Heyer
**Wikidata**: [Q82024225](https://www.wikidata.org/wiki/Q82024225)  
**Source**: https://4ort.xyz/entity/friedrich-heyer-q82024225


## References

1. Catalog of the German National Library
2. [Source](https://www.deutsche-biographie.de/sfz32117.html)
3. Deutsche Biographie
4. CERL Thesaurus
5. [Source](http://thesaurus.cerl.org/record/cnp01168203)