Amsterdam, 6 July 1956 - Institutional correspondence A letter from J. M. Trias de Bes to Alberto Martín-Artajo Álvarez
Hollywood, 18 July 1939 - Institutional correspondence A telegram from the Motion Pictures Artists' Committee to Evelyn Ahrend
ca. 1952–1956 - Internal museum documents Publicity report for the exhibition Studies for Guernica by Arkansas University, addressed to the Travelling Exhibitions Department at the Museum of Modern Art, New York