# Lutz R Ketscher
**Wikidata**: [Q42157202](https://www.wikidata.org/wiki/Q42157202)  
**Source**: https://4ort.xyz/entity/lutz-r-ketscher


## References

1. Catalog of the German National Library
2. ADAGP/CISAC membership list at 07/01/2019
3. Virtual International Authority File
4. ADAGP directory
5. DACS register