Chicago, 21 February 1955 - Management of reproduction rights Marilyn Vaughan's letter to Pablo Picasso
New York, 8 May 1968 - Institutional correspondence Antonio Serrano's letter to Fernando María Castiella
ca. 1952–1956 - Internal museum documents Publicity report for the exhibition Studies for Guernica by the Berea College Art Department, Kentucky, addressed to the Travelling Exhibitions Department at the Museum of Modern Art, New York