# Petr Hadrava

> Czech astronomist

**Wikidata**: [Q12044853](https://www.wikidata.org/wiki/Q12044853)  
**Source**: https://4ort.xyz/entity/petr-hadrava


## References

1. [The Fine Art Archive](https://cs.isabart.org/person/157846)
2. Regional Database of the Central Bohemian Research Library in Kladno
3. [ORCID Public Data File 2020](https://pub.orcid.org/v3.0_rc1/0000-0002-4518-3918/employment/7645679)
4. [Source](https://www.avcr.cz/cs/o-nas/oceneni/medaile-av-cr/cestna-oborova-medaile-ernsta-macha/udelene-medaile/)
5. Virtual International Authority File
6. Czech National Authority Database
7. The Fine Art Archive
8. [ORCID Public Data File 2020](https://pub.orcid.org/v3.0_rc1/0000-0002-4518-3918/researcher-urls/1732363)
9. [Source](https://asep-analytika.lib.cas.cz/zvolit-ustav/asu-r/autor/#0100016)
10. [ORCID Public Data File 2020](https://pub.orcid.org/v3.0_rc1/0000-0002-4518-3918/external-identifiers/1659281)
11. Bibliography of the History of the Czech Lands