# Dirk Petrus Marius Graswinckel
**Wikidata**: [Q21553039](https://www.wikidata.org/wiki/Q21553039)  
**Source**: https://4ort.xyz/entity/dirk-petrus-marius-graswinckel


## References

1. Genealogics
2. Biografisch Portaal
3. Virtual International Authority File