# Jaap Gerhard Sijmons
**Wikidata**: [Q112470664](https://www.wikidata.org/wiki/Q112470664)  
**Source**: https://4ort.xyz/entity/jaap-gerhard-sijmons


## References

1. Integrated Authority File
2. IdRef
3. Czech National Authority Database
4. [Source](https://www.vrijehogeschool50jaar.nl/jaap-sijmons)
5. [Source](https://viaf.org/viaf/data/viaf-20230206-links.txt.gz)