Barcelona, 2 December 1938 - Institutional correspondence Letter from Manuel Sánchez Arcas to José Prat
8 May 2017 - Concert After Guernica. A Sinfonietta by the Reina Sofía Music School, conducted by Baldur Brönnimann
ca. 1952–1956 - Internal museum documents Publicity report for the exhibition Studies for Guernica by the University of Minnesota Gallery, addressed to the Travelling Exhibitions Department at the Museum of Modern Art, New York