New York, 14 June 1939 - Institutional correspondence Evelyn Ahrend's letter to Alfred H. Barr Jr., dated 14 June 1939
New York, 2 November 1964 - Institutional correspondence Alfred H. Barr Jr.'s letter to the editor of The Art Gallery
New York, 18 September 1964 - Institutional correspondence A letter from Betsy Jones to Alfred H. Barr Jr., dated 18 September 1964