# Johan Adriaan Vollgraff

> Ph.D. Universiteit Leiden 1903 (1877–1965)

**Wikidata**: [Q55232603](https://www.wikidata.org/wiki/Q55232603)  
**Source**: https://4ort.xyz/entity/johan-adriaan-vollgraff


## References

1. Integrated Authority File
2. BnF authorities
3. Mathematics Genealogy Project
4. Catalog of the German National Library
5. Source
6. [Source](https://resources.huygens.knaw.nl/bwn1880-2000/en/lemmata/bwn5/bwn2/vollgraff)
7. [Source](http://www.ugentmemorialis.be/catalog/000005895)
8. UGentMemorialis
9. Library of Congress Authorities
10. Virtual International Authority File