Farmington, Connecticut, 20 September 1946 - Personal correspondence James Thrall Soby's letter to William Lieberman
New York, November 10, 1967 - Petition A Call for the Immediate Resignation of all the Rockefellers from the Museum of Modern Art’s Board of Trustees
6 and 13 August 1952 - Press release and communication Press dossier on various exhibitions held at the Museum of Modern Art, New York