# Hellmuth Stefan Seidenfus
**Wikidata**: [Q105939202](https://www.wikidata.org/wiki/Q105939202)  
**Source**: https://4ort.xyz/entity/hellmuth-stefan-seidenfus


## References

1. IdRef
2. Catalog of the German National Library
3. Faceted Application of Subject Terminology
4. Virtual International Authority File
5. CiNii Research
6. Integrated Authority File