# Johann Jacob Harder

> (1734-1775)

**Wikidata**: [Q54506901](https://www.wikidata.org/wiki/Q54506901)  
**Source**: https://4ort.xyz/entity/johann-jacob-harder


## References

1. Integrated Authority File
2. Catalog of the German National Library
3. Baltisches biografisches Lexikon digital
4. Virtual International Authority File