Motherwell writes regarding the publication of the preface he wrote for the exhibit Seventeen modern American painters, which Perls published separately as a pamphlet with the title The school of New York.
Robert Motherwell letter to Frank Perls, 1951 January 27. Frank Perls papers and Frank Perls Gallery records, circa 1920-1983, bulk, 1949-1975. Archives of American Art, Smithsonian Institution.
Current copyright status is undetermined
Archives of American Art, Smithsonian Institution Washington, D.C. 20560