# Gijsbertus Jan Sijthoff
**Wikidata**: [Q43137356](https://www.wikidata.org/wiki/Q43137356)  
**Source**: https://4ort.xyz/entity/gijsbertus-jan-sijthoff


## References

1. RKDartists
2. Artnet
3. Benezit Dictionary of Artists
4. Répertoire des artistes
5. [Source](http://hdl.handle.net/10934/RM0001.COLLECT.326602)
6. [Source](https://www.collectiegelderland.nl/object/1af29879-e194-dfab-c0f1-5aef2e05b2e7)
7. CollectieGelderland