# Frans Jozef Catharina Willekens

> demographer

**Wikidata**: [Q21552152](https://www.wikidata.org/wiki/Q21552152)  
**Source**: https://4ort.xyz/entity/frans-jozef-catharina-willekens


## References

1. [Catalogus Professorum Academiae Groninganae](http://hoogleraren.ub.rug.nl/?page=showPerson&type=hoogleraar&hoogleraar_id=1955)
2. Catalogus Professorum Academiae Groninganae
3. [Source](http://orcid.org/0000-0001-6125-0212)
4. [Source](https://data.dnb.de/opendata/authorities-gnd-person_lds.rdf.gz)
5. Virtual International Authority File
6. [Source](https://www.knaw.nl/leden/willekens)
7. Catalogus Professorum Academiae Rheno-Traiectinae
8. IdRef
9. [SciGraph](https://scigraph.springernature.com/person.014323745215.74)