# Josef Ptáček
**Wikidata**: [Q95096769](https://www.wikidata.org/wiki/Q95096769)  
**Source**: https://4ort.xyz/entity/josef-pt-ek


## 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. [The Fine Art Archive](https://cs.isabart.org/person/151520)
4. [regional database of the Municipal Library of Hradec Kralove](https://kmhk.tritius.cz/authority/2031394)
5. Virtual International Authority File
6. [Source](https://viaf.org/viaf/data/viaf-20230206-links.txt.gz)
7. The Fine Art Archive
8. Bibliography of the History of the Czech Lands