# Rolf M. Steffen
**Wikidata**: [Q94942494](https://www.wikidata.org/wiki/Q94942494)  
**Source**: https://4ort.xyz/entity/rolf-m-steffen


## References

1. Catalog of the German National Library
2. Integrated Authority File
3. Guggenheim Fellows database
4. John Simon Guggenheim Memorial Foundation
5. Virtual International Authority File