New York, 4 November 1944 - Institutional correspondence Alfred H. Barr Jr.'s letter to Pablo Picasso, dated 4 November 1944
New York, 22 September 1960 - Management of reproduction rights Alfred H. Barr Jr.'s letter Pearl Moeller
New York, 25 September 1944 - Institutional correspondence Alfred H. Barr Jr.'s postcard to Pablo Picasso
New York, 31 October 1944 - Institutional correspondence Alfred H. Barr Jr.'s letter to Pablo Picasso
