# Adriaan Daniël Fokker

> Ph.D. Universiteit Leiden 1960

**Wikidata**: [Q94906699](https://www.wikidata.org/wiki/Q94906699)  
**Source**: https://4ort.xyz/entity/adriaan-dani-l-fokker


## References

1. Integrated Authority File
2. Catalog of the German National Library
3. Mathematics Genealogy Project
4. Virtual International Authority File