# Jacek Oniszczuk

> Polish mountaineer

**Wikidata**: [Q47016758](https://www.wikidata.org/wiki/Q47016758)  
**Source**: https://4ort.xyz/entity/jacek-oniszczuk


## References

1. IdRef
2. Virtual International Authority File
3. Catalogue of the Library of the Pontifical University of the Holy Cross