# Detlef Berthelsen
**Wikidata**: [Q95335584](https://www.wikidata.org/wiki/Q95335584)  
**Source**: https://4ort.xyz/entity/detlef-berthelsen


## References

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