Letter from Robert E. Cushman to Joseph Willits, Rockefeller Foundation’s Director for Social Sciences.

Cornell University – Civil Liberties, 1950-1955. Rockefeller Foundation records; Projects (Grants) – Record Group 1; Subgroup 1.1; International and United States – Series 100-257; United States – Series 200; Social Sciences – Subseries 200.S; Rockefeller Archive Center.