# Ernst Keller
**Wikidata**: [Q94863977](https://www.wikidata.org/wiki/Q94863977)  
**Source**: https://4ort.xyz/entity/ernst-keller-q94863977


## References

1. Catalog of the German National Library
2. Integrated Authority File
3. Czech National Authority Database
4. Virtual International Authority File
5. BnF authorities