Prague, 14 November 1947 - Institutional correspondence A letter from J. Groham and T. Madden to Pablo Picasso
New York, 14 August 1942 - Internal museum documents Elodie Courter Osborn's letter to Alfred H. Barr Jr.
New York, 20 August 1942 - Internal museum documents Elodie Courter Osborn's letter to Dorothy Dudley