# Martin Birnbaum

> art dealer, author, critic (1878-1970)

**Wikidata**: [Q78092830](https://www.wikidata.org/wiki/Q78092830)  
**Source**: https://4ort.xyz/entity/martin-birnbaum-q78092830


## References

1. Archives Directory for the History of Collecting in America
2. [Source](https://viaf.org/viaf/data/viaf-20230206-links.txt.gz)
3. Faceted Application of Subject Terminology
4. Virtual International Authority File
5. NUKAT