# Jan Friedberg
**Wikidata**: [Q110214811](https://www.wikidata.org/wiki/Q110214811)  
**Source**: https://4ort.xyz/entity/jan-friedberg


## References

1. Virtual International Authority File
2. Integrated Authority File
3. [Source](https://viaf.org/viaf/data/viaf-20230206-links.txt.gz)
4. VcBA (identifier)
5. NUKAT
6. MAK
7. Bibliography of the History of the Czech Lands