# Adolph Ludwig Koeppen
**Wikidata**: [Q55895411](https://www.wikidata.org/wiki/Q55895411)  
**Source**: https://4ort.xyz/entity/adolph-ludwig-koeppen


## References

1. CERL Thesaurus
2. Catalog of the German National Library
3. NUKAT
4. MAK
5. Virtual International Authority File