# Leendert Marinus Koyck

> Ph.D. Erasmus Universiteit Rotterdam 1954

**Wikidata**: [Q102314545](https://www.wikidata.org/wiki/Q102314545)  
**Source**: https://4ort.xyz/entity/leendert-marinus-koyck


## References

1. [Source](https://link.springer.com/rwe/10.1057/978-1-349-95121-5_719-1)
2. Mathematics Genealogy Project
3. [Source](https://resources.huygens.knaw.nl/bwn1880-2000/lemmata/bwn3/koijck)
4. [Source](https://www.delpher.nl/nl/kranten/view?query=%22L.+M.+Koyck%22+leendert&page=1&coll=ddd&identifier=ABCDDD:010876477:mpeg21:a0254&resultsidentifier=ABCDDD:010876477:mpeg21:a0254&rowid=1)