# Ryszard Siwiec

> Polish patriot (1909–1968)

**Wikidata**: [Q513075](https://www.wikidata.org/wiki/Q513075)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Ryszard_Siwiec)  
**Source**: https://4ort.xyz/entity/ryszard-siwiec


## References

1. [Source](https://archiv.prezident.sk/gasparovic/index1349.html?rad-bieleho-dvojkriza-iii-trieda)
2. International Standard Name Identifier
3. Virtual International Authority File
4. Czech National Authority Database
5. Freebase Data Dumps. 2013
6. Library of Congress Control Number
7. Sejm-Wielki.pl
8. Bibliography of the History of the Czech Lands
9. [Regional Database of the Central Bohemian Research Library in Kladno](https://ipac.svkkl.cz/arl-kl/cs/detail-kl_us_auth-0262885-Siwiec-Ryszard-19091968)