Copenhagen, 31 October 1956 - Institutional correspondence Lars Rostrup Boyesen's letter to Pablo Picasso
Copenhagen, 31 October 1956 - Institutional correspondence Lars Rostrup Boyesen's letter to Daniel-Henry Kahnweiler
Copenhagen, 31 October 1956 - Institutional correspondence Lars Rostrup Boyesen's letter to the Museum of Modern Art, New York
Paris, 6 November 1956 - Institutional correspondence Daniel-Henry Kahnweiler's letter to Lars Rostrup Boyesen
New York, 21 November 1956 - Institutional correspondence Alfred H. Barr Jr.'s letter to Lars Rostrup Boyesen
Basque Country, ca. 1975–1980 - Photograph Mural with the abbreviation of the Communist Movement of the Basque Country (MCE)
3 December 1937 - Newspapers Picasso's Guernica included in an exhibition in Oslo, Copenhagen and Stockholm
Oslo, 27 November 1956 - Institutional correspondence A letter from Miguel de Aldasoro to Alberto Martín-Artajo Álvarez
14 June 1997 - Newspapers The PNV (Basque Nationalist Party) secures a commitment from the PP (People's Party) for the temporary transfer of "Gernika" to Bilbao
15 June 1997 - Newspapers Valencia believes the transfer of "Gernika" and not the Lady of Elche is unfair
14 June 1997 - Newspapers A proposal by the PNV (Basque Nationalist Party) in Congress reopens the controversy over the transfer of «Guernica»
Oslo, 1938 - Exhibition catalogue Catalogue of the exhibition Henri Matisse, Picasso, G. Braque, Laurens at Kunstnernes Hus, Oslo
12 September 1981 - Newspapers Protests in the Basque Country over the installation of Guernica in the Casón del Buen Retiro