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—— Functional Periodicity, Teachers College Studies, No. 69, 1914
—— "Variability as Related to Sex Differences in Achievement," American Journal of Sociology, Jan., 1914
Jastrow, J.: Character and Temperament
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Münsterberg, H.: Vocation and Learning
—— Psychology and Industrial Efficiency
Pearson, K.: "Variation in Man and Woman," in "Chances of Death," 1897
Schneider, H.: "Selecting Young Men for Particular Jobs," Bulletin 7, National Association of Corporation Schools
—— "The Problem of Selecting the Right Job," National Association of Corporation Schools, Bulletin June 9, 1915