# István Ertl

> Hungarian / French Esperantist

**Wikidata**: [Q20891](https://www.wikidata.org/wiki/Q20891)  
**Source**: https://4ort.xyz/entity/istv-n-ertl


## References

1. Nia diligenta kolegaro
2. Czech National Authority Database
3. [Source](https://www.ohtuleht.ee/melu/1090419/palju-onne-naitleja-liina-vahtrik-soudis-abieluranda-armastus-on-tohutu)
4. datos.bne.es
5. general catalog of BnF
6. Original Esperanto Literature
7. Esperanto Wikipedia
8. Integrated Authority File
9. Virtual International Authority File
10. [Source](https://sezonoj.ru/2018/02/ndk-4/)