18 May 1940 - Internal museum documents Circulating exhibition contract for Picasso: Forty Years of His Art (second edition) between the Museum of Modern Art, New York, and the Carnegie Institute
New York, 20 October 1939 - Institutional correspondence Anne Beidberg's letter to Alfred H. Barr Jr.
Artistic project, 7th Berlin Biennale for Contemporary Art, April 27 – July 1, 2012 - Website Occupy Biennale