# Karel Polák
**Wikidata**: [Q95110921](https://www.wikidata.org/wiki/Q95110921)  
**Source**: https://4ort.xyz/entity/karel-pol-k-q95110921


## References

1. Czech National Authority Database
2. Regional Database of the Central Bohemian Research Library in Kladno
3. [Collection of Registry Books at Prague City Archives](http://katalog.ahmp.cz/pragapublica/permalink?xid=66a5918dd71a4bad94f70fcfd4cd231e&scan=137#scan137)
4. [Students of the Universities of Prague 1882–1945](http://is.cuni.cz/webapps/archiv/public/person/se/1841134145534917)
5. Integrated Authority File
6. BillionGraves
7. Virtual International Authority File