# Jan Petrof
**Wikidata**: [Q95361223](https://www.wikidata.org/wiki/Q95361223)  
**Source**: https://4ort.xyz/entity/jan-petrof


## References

1. Czech National Authority Database
2. [regional database of the  Research Library in Hradec Králové](https://www.svkhk.cz/tools/vyroci.asp?zobr=fulllist)
3. [iDNES.cz. 2014](https://www.idnes.cz/onadnes/vztahy/prapravnucka-zakladatele-vyrobce-klaviru-petrof.A140320_120802_spolecnost_jup)
4. Virtual International Authority File
5. [regional database of the Municipal Library of Hradec Kralove](https://kmhk.tritius.cz/authority/1855587)