# Bernard Sack

> Polish pedagogue

**Wikidata**: [Q123013246](https://www.wikidata.org/wiki/Q123013246)  
**Source**: https://4ort.xyz/entity/bernard-sack


## References

1. Polish Science
2. [Source](https://nauka-polska.pl/#/profile/research?id=81674)
3. Virtual International Authority File