# Willem van der Gaaf

> university teacher (1867-1937)

**Wikidata**: [Q67198303](https://www.wikidata.org/wiki/Q67198303)  
**Source**: https://4ort.xyz/entity/willem-van-der-gaaf


## References

1. Album Academicum
2. Catalog of the German National Library
3. Virtual International Authority File
4. Biografisch Portaal