15 January 1940 - Internal museum documents Circulating exhibition contract for Picasso: Forty Years of His Art, between the Museum of Modern Art, New York, and the Minneapolis Institute Of Arts
29 April 1940 - Internal museum documents Circulating exhibition contract for Picasso: Forty Years of His Art, (second edition), between the Museum of Modern Art, New York, and the Cincinnati Art Museum
New York, 8 April 1940 - Institutional correspondence Elodie Courter Osborn's letter to Henry Sayles Francis, dated 8 April 1940
New York, 15 April 1940 - Institutional correspondence Elodie Courter Osborn's letter to Henry Sayles Francis, dated 15 April 1940
15 January 1940 - Internal museum documents Circulating exhibition catalogue for Picasso: Forty Years of His Art (second edition), between the Museum of Modern Art, New York, and the Minneapolis Institute of Arts
19 January 1940 - Internal museum documents Circulating exhibition contract for Picasso: Forty Years of His Art, New York, and the City Art Museum of St. Louis, Missouri
27 March 1940 - Internal museum documents Circulating exhibition contract for Picasso: Forty Years of His Art, between the Museum of Modern Art, New York, and the Institute of Modern Art, Boston
1 May 1940 - Internal museum documents Circulating exhibition contract for Picasso: Forty Years of His Art (second edition) between the Museum of Modern Art, New York, and the Isaac Delgado Museum of Art, New Orleans
18 May 1940 - Internal museum documents Circulating exhibition contract for Picasso: Forty Years of His Art (second edition) between the Museum of Modern Art, New York, and the Carnegie Institute
1940 - Internal museum documents Circulating exhibition contract for Picasso: Forty Years of His Art (second edition), between the Museum of Modern Art, New York, and the Cleveland Museum of Art
12 September 1981 - Newspapers Protests in the Basque Country over the installation of Guernica in the Casón del Buen Retiro
<em>Arts Magazine</em>, New York, vol. 41, no. 6, (April 1967): 48–49 - Article “The Artist as an Angry Artist: The Obsession with Napalm”
Hans-Ulrich Obrist (ed.), <em>Leon Golub: Do Paintings Bite? Selected Texts 1948–1996</em>, Ostfildern: Hatje Cantz, 1997, 184–191 - Article “Guernica, the Apocalypse of Saint-Sever”