# Helena Chłopocka
**Wikidata**: [Q110146751](https://www.wikidata.org/wiki/Q110146751)  
**Source**: https://4ort.xyz/entity/helena-ch-opocka


## References

1. Czech National Authority Database
2. Virtual International Authority File
3. NUKAT
4. CiNii Research
5. Source
6. MAK
7. Bibliography of the History of the Czech Lands
8. National Library of Israel Names and Subjects Authority File