1. ALLINGER, D. A. 1954. Comparison of Negro and white pre-school children in performance on specific items of the Revised Stanford-Binet test. Unpublished master’s thesis, George Washington University.
2. ALPER, T. G. & BORING, E. G. 1944. Intelligence-test scores of northern and southern white and Negro recruits in 1918. J. abnorm. soc. Psychol., 39, 471–474.
3. ARMSTRONG, C. P. 1933. Juvenile delinquency as related to immigration. Sch. & Soc., 38, 61–64.
4. BRIGHAM, C. C. 1923. A study of American intelligence. Princeton: Princeton University Press.
5. BROWN, F. 1944. An experimental and critical study of the intelligence of Negro and white kindergarten children. J. genet. Psychol., 65, 161–175.