# Bernard Johan Christiaan Hazelhoff Roelfzema

> Ph.D. Universiteit Leiden 1870

**Wikidata**: [Q102363231](https://www.wikidata.org/wiki/Q102363231)  
**Source**: https://4ort.xyz/entity/bernard-johan-christiaan-hazelhoff-roelfzema


## References

1. Mathematics Genealogy Project