# Josef Grulich
**Wikidata**: [Q95438649](https://www.wikidata.org/wiki/Q95438649)  
**Source**: https://4ort.xyz/entity/josef-grulich


## References

1. Czech National Authority Database
2. Virtual International Authority File
3. [IS VaVaI](https://api.isvavai.cz/)
4. Bibliography of the History of the Czech Lands