New York, 16 September 1957 - Institutional correspondence A letter from Monroe Wheeler to Katharine Kuh
April, 1987 - Photograph Graffiti in Biscay with the message Euskadi libre ("Free the Basque Country")
Old Westbury, New York, 4 May 1977 - Institutional correspondence Emilia Doyaga's letter to Nelson Rockefeller
9 June 1988 - Newspapers Spain's Ministry of Culture rules out the transfer of Picasso's Guernica to Biscay
Madrid, 16 June 1988 - Internal institutional documents Iñaki Anasagasti's questions to the Congress of Deputies