Gould, S. J.
(1981). The mismeasure of man. New York: Norton.
2.
Grubb, H. J.
(1987). Intelligence score comparisons at the low end of the curve: Where are the racial differences?Journal of Black Psychology, 14(1), 25-34.
3.
Lawler, J. M.
(1978). IQ hereditability and racism. New York: International Publishers.