Davis, R. C. (1932). Ability in social and racial classes: Some physiological correlates. Century for the Institute for Research in the Social Sciences, University of Virginia.

Davis, Roland Clark. Ability in Social and Racial Classes: Some Physiological Correlates. New York: Century for the Institute for Research in the Social Sciences, University of Virginia, 1932.

Davis, Roland Clark. Ability in Social and Racial Classes: Some Physiological Correlates. Century for the Institute for Research in the Social Sciences, University of Virginia, 1932.