# Erwin Keller
**Wikidata**: [Q87400511](https://www.wikidata.org/wiki/Q87400511)  
**Source**: https://4ort.xyz/entity/erwin-keller-q87400511


## References

1. Integrated Authority File
2. Catalogue of the Library of the Pontifical University of the Holy Cross
3. [Source](https://viaf.org/viaf/data/viaf-20230206-links.txt.gz)
4. Virtual International Authority File