Amsterdam, 5 May 1953 - Institutional correspondence Willem Sandberg's letter to Eugenio Reale, dated 5 May 1953
Milan, 4 August 1953 - Institutional correspondence A letter from Fernanda Wittgens to Willem Sandberg, dated 4 August 1953
New York, 7 October 1953 - Institutional correspondence A letter from Letitia T. Howe to Pablo Picasso
1 October 1953 - Press release and communication Press release from the Museum of Modern Art, New York, on Guernica's journey to Europe
ca. 1952–1957 - Internal museum documents Publicity report for the exhibition Studies for Guernica by the Kansas State Teachers College, Pittsburg, addressed to the Travelling Exhibitions Department at the Museum of Modern Art, New York