Letter from John Volkman to Dr. Muzafer Sherif, September 10, 1954
in Muzafer and Carolyn Wood Sherif Papers, of University of Akron. Cummings Center for the History of Psychology (1954), Series 5: Research Studies, 1949-1967, Sub-series 2: Robber's Cave Study, 1953-1954, Box M3552, Folder 6 , 1 page(s)