# Friedrich Richard Heyer
**Wikidata**: [Q109855951](https://www.wikidata.org/wiki/Q109855951)  
**Source**: https://4ort.xyz/entity/friedrich-richard-heyer


## References

1. Integrated Authority File
2. archINFORM
3. Union List of Artist Names
4. Open Library
5. Faceted Application of Subject Terminology
6. [archINFORM](https://www.archinform.net/service/wd_aiarch.php)