Philadelphia, 18 September 1957 - Institutional correspondence Henry Clifford's letter to Pablo Picasso
New York, 3 December 1957 - Internal museum documents A letter from Dorothy C. Miller to Monroe Wheeler
New York, 6 December 1957 - Institutional correspondence Monroe Wheeler's letter to Dorothy Miller and Alfred H. Barr Jr.
10 March 1957 - Internal museum documents A provisional list of Pablo Picasso works on loan at the Museum of Modern Art, New York
