# Ryszard Jakubczak
**Wikidata**: [Q85134231](https://www.wikidata.org/wiki/Q85134231)  
**Source**: https://4ort.xyz/entity/ryszard-jakubczak


## References

1. Integrated Authority File
2. [Source](https://viaf.org/viaf/data/viaf-20230206-links.txt.gz)
3. Polish Science
4. Library of Congress Authorities
5. Virtual International Authority File