# Witold Biernacki
**Wikidata**: [Q9375598](https://www.wikidata.org/wiki/Q9375598)  
**Source**: https://4ort.xyz/entity/witold-biernacki


## References

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