# Karl Jacob

> German historian

**Wikidata**: [Q95007628](https://www.wikidata.org/wiki/Q95007628)  
**Source**: https://4ort.xyz/entity/karl-jacob-q95007628


## References

1. Catalog of the German National Library
2. Integrated Authority File
3. Czech National Authority Database
4. Virtual International Authority File
5. CiNii Research