# Frederik Koch

> Dutch Esperantist and working-class organizer (1901-1966)

**Wikidata**: [Q81732981](https://www.wikidata.org/wiki/Q81732981)  
**Source**: https://4ort.xyz/entity/frederik-koch


## References

1. [Source](https://www.wiewaswie.nl/nl/detail/31298042)
2. [Source](https://archief.amsterdam/indexen/deeds/985333eb-8716-56a3-e053-b784100ade19?person=985333eb-8717-56a3-e053-b784100ade19)
3. [Het Parool](https://resolver.kb.nl/resolve?urn=ABCDDD:010836000:mpeg21:a0348)
4. [Military Records 1828-1940](https://archief.amsterdam/indexen/deeds/98533455-dd6e-56a3-e053-b784100ade19?person=98533455-dd6f-56a3-e053-b784100ade19)