# Krzysztof Jan Walczak

> Polish historian

**Wikidata**: [Q19691440](https://www.wikidata.org/wiki/Q19691440)  
**Source**: https://4ort.xyz/entity/krzysztof-jan-walczak


## References

1. Integrated Authority File
2. Czech National Authority Database
3. [Source](https://viaf.org/viaf/data/viaf-20230206-links.txt.gz)
4. Virtual International Authority File
5. Polish Science
6. Library of Congress Authorities
7. [Source](https://nauka-polska.pl/#/profile/scientist?id=22239)
8. National Library of Israel Names and Subjects Authority File
9. Bibliography of the History of the Czech Lands