# David Willen
**Wikidata**: [Q85104250](https://www.wikidata.org/wiki/Q85104250)  
**Source**: https://4ort.xyz/entity/david-willen


## References

1. Integrated Authority File
2. SIKART
3. [Source](https://en.foto-ch.ch/photographer?detail=30740&type=photographer)
4. Catalog of the German National Library