1. Weinberg Daniel E. , “The Foreign Language Information Service and the Foreign Born, 1918–1939: A Case Study of Cultural Assimilation Viewed as a Problem in Social Technology” (Ph. D. diss., University of Minnesota, 1973), pp. 158–62, 172–73, 177
2. Montalto Nicholas V. , “The Forgotten Dream: A History of the Intercultural Education Movement, 1924–1941” (Ph. D. diss., University of Minnesota, 1977), chap. 2
3. Race Problems in America;Benedict's;The Annals,1941