Madrid, 8 July 1972 - Institutional correspondence A letter from Xavier de Salas to Florentino Pérez Embid
9 November 1952 - Newspapers Excellent Paintings Displayed in exhibition of Harrison-Berne; Museum Showing Picasso Prints
New York, November 10, 1967 - Petition A Call for the Immediate Resignation of all the Rockefellers from the Museum of Modern Art’s Board of Trustees