# Pilsen 4
**Wikidata**: [Q581864](https://www.wikidata.org/wiki/Q581864)  
**Source**: https://4ort.xyz/entity/pilsen-4


## References

1. Czech National Authority Database
2. Historical lexicon of municipalities in the Czech Republic – 1869–2011
3. Source
4. Mapy.com
5. [Regional Database of the Central Bohemian Research Library in Kladno](https://ipac.svkkl.cz/arl-kl/cs/detail-kl_us_auth-0256497-Plzen-4-cesko)