New York, 20 March 1980 - Internal institutional documents An agreement over the conditions and delivery date of Guernica
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