# Ivan Růžička
**Wikidata**: [Q95151082](https://www.wikidata.org/wiki/Q95151082)  
**Source**: https://4ort.xyz/entity/ivan-r-i-ka


## References

1. [Source](http://actarerumnaturalium.cz/wp-content/uploads/2020/01/ARN_2019__6.pdf)
2. [regional database of the Regional Library of Highlands](https://tritius.kkvysociny.cz/authority/1066096)
3. Czech National Authority Database
4. Virtual International Authority File
5. Bibliography of the History of the Czech Lands