# Tvrdohlaví
**Wikidata**: [Q12054565](https://www.wikidata.org/wiki/Q12054565)  
**Source**: https://4ort.xyz/entity/tvrdohlav-


## References

1. Virtual International Authority File
2. [Regional Database of the Central Bohemian Research Library in Kladno](https://ipac.svkkl.cz/arl-kl/cs/detail-kl_us_auth-k0003534-Tvrdohlavi-umelecka-skupina)