Madrid, 11 September 1980 - Institutional correspondence Javier Tusell's letter to José Pedro Pérez-Llorca
Madrid, 23 and 25 September 1980 - Institutional correspondence Alejandro de Muns' letter to Javier Tusell, with reply
Madrid, 11 December 1980 - Internal institutional documents Javier Tusell's report on negotiations for the transfer of Guernica
Madrid, 13 November 1980 - Institutional correspondence A letter from Javier Tusell to Íñigo Cavero, dated 13 November 1980
New York, 20 March 1980 - Internal institutional documents An agreement to deliver Guernica to the Spanish government
