# Theodor Čejka

> Czech Esperantist and science writer (1878–1957)

**Wikidata**: [Q3564868](https://www.wikidata.org/wiki/Q3564868)  
**Source**: https://4ort.xyz/entity/theodor-ejka


## References

1. Czech National Authority Database
2. [REGO](https://aleph.vkol.cz/F/?func=find-c&ccl_term=sys=000006526&local_base=svk04)
3. [Olomouc City Library regional database](https://tritius.kmol.cz/authority/771644)
4. Integrated Authority File
5. Nia diligenta kolegaro
6. Virtual International Authority File
7. [Source](https://sezonoj.ru/2018/02/ndk-4/)