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
Communiqué, Boston, October 4, 2012 - Press release Museum of Fine Arts, Boston, Helps Commemorate the 50th Anniversary of the Cuban Missile Crisis with the Loan of a Picasso to the JFK Library and Museum
<em>The New York Times</em>, New York, February 5, 2003, 27 - Article Maureen Dowd, “Powell Without Picasso”