# Jerzy Sperka

> Polish medievalist

**Wikidata**: [Q11725426](https://www.wikidata.org/wiki/Q11725426)  
**Source**: https://4ort.xyz/entity/jerzy-sperka


## References

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