# Harmen Koopmans
**Wikidata**: [Q1809319](https://www.wikidata.org/wiki/Q1809319)  
**Source**: https://4ort.xyz/entity/harmen-koopmans


## References

1. Source
2. [Source](https://www.nationaalarchief.nl/onderzoeken/index/nt00464/140388b3-bf2e-0c1d-e063-6df0900abf33)
3. TracesOfWar