Madrid, May to June 1982 - Conferences and articles Lectures on the 19th century and Guernica given as part of the Missions of Art programme held at the Museo Nacional del Prado from May to June 1982
New York, 4 May 1950 - Institutional correspondence Joseph Schwartz's letter to the Museum of Modern Art, New York
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