Paris, 27 February 1958 - Institutional correspondence Daniel-Henry Kahnweiler's letter to Alfred H. Barr Jr., dated 27 February 1958
New York, 22 September 1960 - Management of reproduction rights Alfred H. Barr Jr.'s letter Pearl Moeller
London, 7 March 1958 - Management of reproduction rights A letter from Diana K. Watson to Richard Griffith