New York, 20 March 1980 - Internal institutional documents An agreement over the conditions and delivery date of Guernica
Madrid, 4 February 1988 - Internal institutional documents Reply from Spain's Ministry of Culture regarding the questions put forward by Andrés Ollero in the Congress of Deputies
Madrid, 14 April 1988 - Internal institutional documents A reply from the Ministry of Culture to the questions put forward by Iñaki Anasagasti in the Congress of Deputies
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
Madrid, 16 June 1988 - Internal institutional documents Iñaki Anasagasti's questions to the Congress of Deputies
3 October 1980 - Internal institutional documents A confidential letter from Spain's Ministry of Culture regarding negotiations for Guernica
1980 - Internal institutional documents Report by the Management Board of Artistic Heritage, Archives and Museums on the moral rights and legislation with regard to Guernica
Madrid, 11 December 1980 - Internal institutional documents Javier Tusell's report on negotiations for the transfer of Guernica
Madrid, September 1980 - Internal institutional documents A report on the requirements for the transfer of Guernica from New York to Spain
New York, 20 March 1980 - Internal institutional documents An agreement to deliver Guernica to the Spanish government