5 July 1978 - Internal institutional documents A report on the transfer of Guernica by Spain's Ministry of Culture
Madrid, 18 July 1978 - Institutional correspondence A letter from the Management Board of Cultural Relations to the director-general of Artistic Heritage, Archives and Museums
1975 - Internal institutional documents Extract from the index of the catalogue for the exhibition Vanguardia artística y realidad social en el estado español: 1963/1976
Madrid, 1 September 1977 - Institutional correspondence A letter from Jesús Madalena to José Mario Armero
Paris, 30 October 1971 - Institutional correspondence A letter from Luis López Ballesteros to Alfredo Sánchez Bella
Paris, ca. 1981 - Institutional correspondence A communiqué from Rafael Fernández Quintanilla on the viewpoint of Pablo Picasso's heirs
Madrid, 4 February 1981 - Institutional correspondence A letter from Javier Tusell to Íñigo Cavero, dated 4 February 1981
Madrid, 13 November 1980 - Institutional correspondence A letter from Javier Tusell to Íñigo Cavero, dated 13 November 1980
Madrid, 17 September 1980 - Institutional correspondence A letter from José Mario Armero to Íñigo Cavero
Madrid, September 1980 - Internal institutional documents A report on the requirements for the transfer of Guernica from New York to Spain