# Karol Łopatecki
**Wikidata**: [Q48842543](https://www.wikidata.org/wiki/Q48842543)  
**Source**: https://4ort.xyz/entity/karol-opatecki


## References

1. Integrated Authority File
2. IdRef
3. Virtual International Authority File
4. CiNii Research
5. Polish Science
6. Library of Congress Authorities