# Johannes Gerard Hulst van Keulen van de Velde

> Dutch scientific instrument maker

**Wikidata**: [Q65961253](https://www.wikidata.org/wiki/Q65961253)  
**Source**: https://4ort.xyz/entity/johannes-gerard-hulst-van-keulen-van-de-velde


## References

1. Repertorium van Nederlandse kaartmakers
2. [Source](http://www.dwc.knaw.nl/biografie/scientific-instrument-makers/?pagetype=authorDetail&aId=PE00015123)