Paris, 12 November 1969 - Institutional correspondence A letter from Roland Dumas to William S. Lieberman, dated 12 November 1969
New York, 5 July 1956 - Institutional correspondence William S. Lieberman's letter to Richard Griffith
New York, 23 October 1969 - Institutional correspondence Elizabeth Shaw's letter to William S. Lieberman
Paris, 12 November 1969 - Institutional correspondence A letter from Roland Dumas to William S. Lieberman, dated 12 November 1969
Paris, 1 March 1975 - Personal correspondence Claude Picasso's letter to William S. Lieberman, dated 1 March 1975
New York, 31 May 1977 - Institutional correspondence William S. Lieberman's letter to Richard Oldenburg, dated 31 May 1977
New York, 1 June 1977 - Institutional correspondence William S. Lieberman's letter to Richard Oldenburg, dated 1 June 1977
New York, 7 June 1977 - Institutional correspondence William S. Lieberman's letter to Richard Oldenburg, dated 7 June 1977
Farmington, Connecticut, 20 September 1946 - Personal correspondence James Thrall Soby's letter to William Lieberman
New York, 13 July 1955 - Internal museum documents Internal letter from the Museum of Modern Art, New York, to William Lieberman
New York, 22 November 1969 - Institutional correspondence A letter from William S. Lieberman to Roland Dumas
New York, 7 March 1956 - Institutional correspondence William S. Lieberman's letter to Porter McCrary
