# Berthold Keller

> German trade unionist (1927–2012)

**Wikidata**: [Q827961](https://www.wikidata.org/wiki/Q827961)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Berthold_Keller)  
**Source**: https://4ort.xyz/entity/berthold-keller


## References

1. Integrated Authority File
2. Virtual International Authority File
3. Munzinger Personen