# Karol Olejnik

> Polish historian

**Wikidata**: [Q11736229](https://www.wikidata.org/wiki/Q11736229)  
**Source**: https://4ort.xyz/entity/karol-olejnik


## References

1. IdRef
2. Czech National Authority Database
3. [Source](https://viaf.org/viaf/data/viaf-20230206-links.txt.gz)
4. Virtual International Authority File
5. CiNii Research
6. Polish Science
7. Library of Congress Authorities
8. National Library of Israel Names and Subjects Authority File
9. Bibliography of the History of the Czech Lands