# Ursula Markus

> Swiss photographer

**Wikidata**: [Q17194430](https://www.wikidata.org/wiki/Q17194430)  
**Source**: https://4ort.xyz/entity/ursula-markus


## References

1. RKDartists
2. Integrated Authority File
3. ADAGP/CISAC membership list at 07/01/2019
4. general catalog of BnF
5. Virtual International Authority File
6. Catalogue of the Unione Romana Biblioteche Scientifiche
7. ADAGP directory
8. DACS register