# Charles Hartman

> Ph.D. Universiteit Leiden 1899

**Wikidata**: [Q102362262](https://www.wikidata.org/wiki/Q102362262)  
**Source**: https://4ort.xyz/entity/charles-hartman


## References

1. IdRef
2. Mathematics Genealogy Project
3. [Source](https://hetutrechtsarchief.nl/collectie/609C5B9B2DB04642E0534701000A17FD)
4. Dutch National Thesaurus for Author Names