(3) Thompson, Helen B. The Mental Traits of Sex. An experimental investigation of the normal mind in men and women. Chicago, 1903.
(4) Montague, Helen, and Hollingworth, Leta S. "The Comparative Variability of the Sexes at Birth," American Journal of Sociology, XX (1914-15), 335-70.
(5) Thomas, W. I. Sex and Society. Chicago, 1907.
(6) Weidensall, C. J. The Mentality of the Criminal Woman. A comparative study of the criminal woman, the working girl, and the efficient working woman, in a series of mental and physical tests. Baltimore, 1916.
(7) Hollingworth, Leta S. "Variability as Related to Sex Differences in Achievement," American Journal of Sociology, XIX (1913-14), 510-30. [Bibliography.]
E. Racial Differences
(1) Boas, F. The Mind of Primitive Man. New York, 1911.
(2) Cambridge Anthropological Expedition to Torres Straits. 5 vols. Cambridge, 1901-08.
(3) Le Bon, G. The Psychology of Peoples. Its influence on their evolution. New York and London, 1898. [Translation.]
(4) Reuter, E. B. The Mulatto in the United States. Boston, 1918.