# Hans Rudolf de Ruiter

> Ph.D. Universiteit Leiden 1978

**Wikidata**: [Q102314298](https://www.wikidata.org/wiki/Q102314298)  
**Source**: https://4ort.xyz/entity/hans-rudolf-de-ruiter


## References

1. data.bibliotheken.nl
2. Virtual International Authority File
3. Mathematics Genealogy Project
4. Library of Congress Authorities