# Johann Carl Frederik Hellfried
**Wikidata**: [Q94881802](https://www.wikidata.org/wiki/Q94881802)  
**Source**: https://4ort.xyz/entity/johann-carl-frederik-hellfried


## References

1. Catalog of the German National Library
2. Integrated Authority File
3. Genealogics
4. CERL Thesaurus
5. Open Library
6. [Source](http://www.genealogics.org/getperson.php?personID=I00432175&tree=LEO)
7. [Source](http://thesaurus.cerl.org/record/cnp01929187)