# Jan Daniël Posthumus
**Wikidata**: [Q110168059](https://www.wikidata.org/wiki/Q110168059)  
**Source**: https://4ort.xyz/entity/jan-dani-l-posthumus


## References

1. [Source](https://www.openarchieven.nl/nha:7075FFEA-2717-4296-ABC5-F5E6A1A4FBD2)
2. [Source](https://www.openarch.nl/nha:7075ffea-2717-4296-abc5-f5e6a1a4fbd2)
3. [1910](https://n2t.net/ark:/33862/collect/513513)
4. [Source](https://www.perfinclubnederland.nl/wp-content/uploads/2019/07/De-gebruiker-van-JDP-2_13-4_pp107.pdf)
5. [Source](https://www.openarchieven.nl/saa:99e87e42-7041-2bb2-e053-b784100a6a2e)
6. CollectieGelderland