# Rudolf Hacker
**Wikidata**: [Q30321490](https://www.wikidata.org/wiki/Q30321490)  
**Source**: https://4ort.xyz/entity/rudolf-hacker


## References

1. [regional database of the  Research Library in Hradec Králové](https://aleph.svkhk.cz/F/?func=direct&doc_number=000056702&local_base=hka10&format=999)
2. Czech National Authority Database
3. [regional database of the  Research Library in Hradec Králové](https://www.svkhk.cz/tools/vyroci.asp?zobr=fulllist)
4. [regional database of the Municipal Library of Hradec Kralove](https://kmhk.tritius.cz/authority/1853955)
5. [Source](https://ddvd.kpsys.cz/records/21ae67c0-f1ad-4e52-82cd-558a75fa9975)
6. Bibliography of the History of the Czech Lands