Madrid, 22 April 1976 - Internal institutional documents A report by Joaquín de la Puente on the ownership of Guernica and the negotiation possibilities with the Museum of Modern Art, New York
Madrid, 10 September 1981 - Internal museum documents Certificate for the reception of Guernica, and its stretcher and related works
Cover of <em>Life</em>, New York, May 15, 1970 - Magazine “Tragedy at Kent. Cambodia and Dissent: The Crisis of Presidential Leadership”