London, 6 November 1938 - Personal correspondence Roland Penrose's letter to Pablo Picasso, dated 6 November 1938
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
San Francisco, 1939 - Photograph Views of the installation of the exhibition Picasso's Guernica at the San Francisco Museum of Modern Art
Madrid, 5 November 1980 - Institutional correspondence A letter from Íñigo Cavero to Blanche de Philip P. Weisberg (Blanche Mahler)
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
ca. 1981 - Manuscript Comments on the declarations of Blanche Mahler regarding the arrival of Guernica to New York