New York, 4 May 1950 - Institutional correspondence Joseph Schwartz's letter to the Museum of Modern Art, New York
Communiqué, Boston, October 4, 2012 - Press release Museum of Fine Arts, Boston, Helps Commemorate the 50th Anniversary of the Cuban Missile Crisis with the Loan of a Picasso to the JFK Library and Museum
New York, February 24, 1970 - Letter A letter from Walter Bareiss and Robert Von Berg to Wilder Green