# Robert Ackermann
**Wikidata**: [Q93233068](https://www.wikidata.org/wiki/Q93233068)  
**Source**: https://4ort.xyz/entity/robert-ackermann


## References

1. Bibliothèque nationale de France
2. Virtual International Authority File
3. Catalogue of the Library of the Pontifical University of the Holy Cross
4. BnF authorities