# Zygmunt Hempel
**Wikidata**: [Q9392887](https://www.wikidata.org/wiki/Q9392887)  
**Source**: https://4ort.xyz/entity/zygmunt-hempel


## References

1. Catalog of the German National Library
2. [Source](http://viaf.org/viaf/data/viaf-20170101-links.txt.gz)
3. Virtual International Authority File
4. Integrated Authority File
5. Sejm-Wielki.pl