Paris, 17 November 1959 - Institutional correspondence A letter from the Groupe d'étudiants d'espagnol to Pablo Picasso
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
Paris, 1937 - Photograph Inside the Spanish Pavilion at the Paris International Exhibition of Art and Technology in Modern Life. Pablo Picasso's Guernica and the Mercury Fountain, by Alexander Calder