# Oldrich Heidrich
**Wikidata**: [Q5797501](https://www.wikidata.org/wiki/Q5797501)  
**Source**: https://4ort.xyz/entity/oldrich-heidrich


## References

1. Czech National Authority Database
2. [The Fine Art Archive](https://cs.isabart.org/person/111391)
3. Virtual International Authority File
4. [LIBRIS. 2012](https://libris.kb.se/katalogisering/dbqswz2x4tlcm55)
5. Bibliography of the History of the Czech Lands
6. [Regional Database of the Central Bohemian Research Library in Kladno](https://ipac.svkkl.cz/arl-kl/cs/detail-kl_us_auth-0330188-Ambroz-Vladimir-18921950)