New York, 26 June 1978 - Institutional correspondence A letter from Judith Cousins to William Burback
New York, 8 April 1981 - Press release and communication A press release from New York's Museum of Modern Art concerning a Spanish delegation's request to send Guernica to Spain
New York, February 24, 1970 - Letter A letter from Walter Bareiss and Robert Von Berg to Wilder Green