# Jacek Friedrich
**Wikidata**: [Q105334895](https://www.wikidata.org/wiki/Q105334895)  
**Source**: https://4ort.xyz/entity/jacek-friedrich


## References

1. BnF authorities
2. archINFORM
3. Integrated Authority File
4. Virtual International Authority File
5. Library of Congress Authorities
6. [archINFORM](https://www.archinform.net/service/wd_aiarch.php)