Madrid, 2 December 1975 and Berkeley, California, 8 January 1976 - Institutional correspondence A letter from José Mario Armero to Herschel B. Chip, with reply
New York, 20 March 1980 - Internal institutional documents An agreement over the conditions and delivery date of Guernica
Madrid, 6 December 1968 - Institutional correspondence Luis Carrero Blanco's letter to Florentino Pérez Embid
Mougins, 14 November 1970 - Institutional correspondence Pablo Picasso's letter to the New York's Museum of Modern Art
Internal institutional documents A communiqué from the Spanish government regarding the delivery of Guernica
Stockholm, 23 October 1956 - Institutional correspondence Ernesto de Zulueta's letter to Alberto Martín-Artajo Álvarez
New York, 25 May 1939 - Institutional correspondence Sidney Janis's letter to the Motion Pictures Artists' Committee
New York, 10 June 1939 - Institutional correspondence Evelyn Ahrend's letter to Marcelene Peterson, dated 10 June 1939
Flushing, New York, 23 May 1939 - Institutional correspondence Simon Guggenheim's and Dana C. Backus's form letter to ask for donations
3 April 1939 - Minutes Minutes from a meeting of the Executive Committee of the Spanish Intellectual Aid, dated 3 April 1939
Toronto, 21 July 1939 - Institutional correspondence Phyllis Lane's letter to Evelyn Ahrend, dated 21 July 1939
New York, 4 August 1939 - Institutional correspondence Sidney Janis's telegram to the FIne Arts Gallery of San Diego
1945 - Internal museum documents Alfred H. Barr Jr.'s notes for the screenplay of the film Guernica by Robert Flaherty
New York, 19 May 1980 - Institutional correspondence William Rubin's letter to Rafael Fernández Quintanilla, dated 19 May 1980
New York, 17 June 1980 - Institutional correspondence William Rubin's letter to Rafael Fernández Quintanilla, dated 17 June 1980
New York, 20 March 1980 - Internal institutional documents An agreement to deliver Guernica to the Spanish government
Madrid, 11 December 1979 - Institutional correspondence Marcelino Oreja's letter to Manuel Clavero Arévalo
Barcelona, 14 September 1979 - Internal institutional documents Transcript of the agreement approved by the Municipal Standing Committee
Buenos Aires, 28 November 1979 - Institutional correspondence Rafael Fernández Quintanilla's letter to José Joaquín Puig de la Bellacasa
Paris, 13 November 1979 - Institutional correspondence A letter from Roland Dumas to Rafael Fernández Quintanilla