# Jan D. Bláha

> Czech geographer and cartographer

**Wikidata**: [Q50567043](https://www.wikidata.org/wiki/Q50567043)  
**Source**: https://4ort.xyz/entity/jan-d-bl-ha


## References

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