# Břetislav Picka
**Wikidata**: [Q107643811](https://www.wikidata.org/wiki/Q107643811)  
**Source**: https://4ort.xyz/entity/b-etislav-picka


## References

1. Czech National Authority Database
2. Regional Database of the Central Bohemian Research Library in Kladno
3. [regional database of the Pilsen City Library](https://tritius.plzen.eu/authority/229132)