# Eugen Ludwig
**Wikidata**: [Q58360723](https://www.wikidata.org/wiki/Q58360723)  
**Source**: https://4ort.xyz/entity/eugen-ludwig


## References

1. Historical Dictionary of Switzerland
2. Integrated Authority File
3. Catalog of the German National Library
4. [Source](http://www.hls-dhs-dss.ch/textes/d/D14458.php)
5. Deutsche Biographie
6. Autoritats UB
7. Archivi storici dell'Università di Torino
8. NUKAT
9. Virtual International Authority File