New York, 20 March 1980 - Internal institutional documents An agreement over the conditions and delivery date of Guernica
16 February 1976 - Institutional correspondence Report for the National Commission of Artistic Heritage
Madrid, 1981 - Internal museum documents Record sheet of the entry of Guernica into the Casón del Buen Retiro, Madrid
Madrid, 1981 - Internal institutional documents A letter about the exhibition at the Casón del Buen Retiro
Madrid, 31 July, and Cambridge, Massachusetts, 31 August 1981 - Institutional correspondence Álvaro Martínez Novillo's letter to Josep Lluís Sert, with reply
Madrid, 29 May and 10 June 1981 - Institutional correspondence A letter from Felipe Cons Gorostola to Álvaro Martínez Novillo, and reply
22 November 1980 - Institutional correspondence Rafael Fernández Quintanilla's letter to Javier Tusell, dated 22 November 1980
New York, 31 August 1981 - Institutional correspondence John Koegel's letter to Richard E. Oldenburg, dated 31 August 1981
New York, 16 October 1981 - Institutional correspondence John Koegel's letter to Javier Tusell, dated 16 October 1981
New York, 16 October 1981 - Institutional correspondence John Koegel's letter to Javier Tusell, dated 16 October 1981
New York, 16 October 1981 - Institutional correspondence John Koegel's letter to Javier Tusell, dated 16 October 1981
Madrid, 30 March 1988 - Internal institutional documents A letter from the director-general of Fine Arts to the Cabinet of Spain's Ministry of Culture
9 September 1981 - Internal museum documents Internal communiqué from Richard Oldenburg, director of the Museum of Modern Art, New York, on the departure of Guernica
Madrid, 25 October 1981 - TV programme The RTVE programme on installing Guernica inside the Casón del Buen Retiro