# Jacobus Joannes Graaf
**Wikidata**: [Q52155217](https://www.wikidata.org/wiki/Q52155217)  
**Source**: https://4ort.xyz/entity/jacobus-joannes-graaf


## References

1. Biografisch Portaal
2. Digital Library for Dutch Literature
3. Project Gutenberg
4. [Source](https://www.dbnl.org/tekst/_jaa003192501_01/_jaa003192501_01_0012.php)
5. Virtual International Authority File