[6.]

Hollingworth, L.S. Variability as Related to Sex Differences in Achievement. Am. Jour, of Sociol., XIX., 1914, pp. 510-530.

[7.]

Lowie, R.H. & Hollingworth, L.S. Science and Feminism. Sci. Mthly., Sept., 1916, pp. 277-284.

[8.]

Montague, Helen & Hollingworth, L.S. Comparative Variability of the Sexes at Birth. Am. J. of Sociol. XX, 335-70. 1915.

[9.]