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
<em>October</em>, no. 110, Cambridge (MA): The MIT Press (autumn, 2004): 3–22 - Essay “An Archival Impulse”