# Hendrik Joan Calkoen
**Wikidata**: [Q130757011](https://www.wikidata.org/wiki/Q130757011)  
**Source**: https://4ort.xyz/entity/hendrik-joan-calkoen


## References

1. [online catalogue of Huis van het boek](https://mmm-web.adlibhosting.com/AIS6/Details/collect/7521688)