# Oskar Tietjens

> Ph.D. Georg-August-Universität Göttingen 1923

**Wikidata**: [Q84349048](https://www.wikidata.org/wiki/Q84349048)  
**Source**: https://4ort.xyz/entity/oskar-tietjens


## References

1. Czech National Authority Database
2. Mathematics Genealogy Project
3. NUKAT
4. CiNii Research
5. Virtual International Authority File