# Willem Philippus Coolhaas
**Wikidata**: [Q133297436](https://www.wikidata.org/wiki/Q133297436)  
**Source**: https://4ort.xyz/entity/willem-philippus-coolhaas


## References

1. [Source](https://www.openarchieven.nl/nha:03B4DE63-C45B-420A-A3D7-47D5FC7B49A9)
2. [1971](https://n2t.net/ark:/33862/collect/710071)