Mexico City, 26 September 1968 - Institutional correspondence A letter from Rachmael ben Avram to Nelson Rockefeller
Mexico City, 26 September 1968 - Institutional correspondence Rachmael ben Avram's letter to Carol K. Uht
New York, April 1967 - Petition A request from Angry Arts to support the withdrawal of Guernica from the Museum of Modern Art, New York