Paris, 10 February 1955 - Institutional correspondence Daniel-Henry Kahnweiler's letter to Alfred H. Barr Jr., dated 10 February 1955
March, 1955 - Internal museum documents Annotation on the exhibit label for the exhibition Picasso: 12 Masterworks
New York, 13 July 1955 - Internal museum documents Internal letter from the Museum of Modern Art, New York, to William Lieberman
16 March 1955 - Press release and communication Press release on a special exhibition featuring 12 of Picasso’s masterpieces in New York’s Museum of Modern Art in 1955