Paris, 3 October 1948 - Institutional correspondence Pablo Picasso's letter to Alfred H. Barr Jr., dated 3 October 1948
14 June 1973 - Personal correspondence Roland Penrose's letter to Alfred H. Barr and Margaret Scolari Barr
Paris, 18 October 1948 - Institutional correspondence A letter from Mariano Miguel to José Ballester-Gozalvo
Paris, 26 November 1948 - Institutional correspondence A letter from Pablo Picasso to Alfred H. Barr Jr., dated 26 November 1948
New York, 3 December 1948 - Institutional correspondence Alfred H. Barr Jr's letter to Pablo Picasso, dated 3 December 1948
New York, 6 August 1973 - Institutional correspondence A letter from Betsy Jones to Daniel-Henry Kahnweiler