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
Stockholm, 1956 - Photograph Photographs of the assembly of the exhibition Guernica, avec 60 études in the Nationalmuseum, Stockholm
Madrid, 10 September 1981 - Internal museum documents Certificate for the reception of Guernica, and its stretcher and related works