# Karl Alfred Pfenninger
**Wikidata**: [Q85101145](https://www.wikidata.org/wiki/Q85101145)  
**Source**: https://4ort.xyz/entity/karl-alfred-pfenninger


## References

1. Catalog of the German National Library
2. Artists of the World Online
3. SIKART
4. [Source](http://www.sikart.ch/KuenstlerInnen.aspx?id=11500606)