Mexico, 21 December 1939 - Personal correspondence Juan Larrea's letter to Pablo Picasso, dated 21 December 1939
Flushing, New York, 23 May 1939 - Institutional correspondence Simon Guggenheim's and Dana C. Backus's form letter to ask for donations
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
New York, 4 August 1939 - Institutional correspondence Sidney Janis's telegram to the FIne Arts Gallery of San Diego
Cambridge, Massachusetts, 20 November 1939 - Personal correspondence Josep Lluís Sert's letter to Pablo Picasso, dated 20 November 1939
New York, 15 December 1939 - Institutional correspondence Alfred H. Barr Jr.'s telegram to Pablo Picasso, dated 15 December 1939
1943 - Internal museum documents Itinerary of the touring exhibition Picasso: Forty Years of His Art and its adaptations from 1940 to 1943
San Francisco, 1939 - Photograph Views of the installation of the exhibition Picasso's Guernica at the San Francisco Museum of Modern Art
New York, 1940–1941 - Internal museum documents Installation list and checklist for Picasso: Forty Years of His Art (second edition)
Madrid, 5 November 1980 - Institutional correspondence A letter from Íñigo Cavero to Blanche de Philip P. Weisberg (Blanche Mahler)
23 November 1939 - Personal correspondence Francisco de Troya's letter to Pablo Picasso, dated 23 November 1939
September, 1939 - Leaflet Programme of activities carried out inside the framework of the exhibition Guernica and 59 Preparatory Studies at the San Francisco Museum of Art
Madrid, 17 September 1980 - Institutional correspondence A letter from José Mario Armero to Íñigo Cavero
ca. 1981 - Manuscript Comments on the declarations of Blanche Mahler regarding the arrival of Guernica to New York