Hankins, F. H., "The Declining Birth-Rate," Journal of Heredity, V, pp. 36-39, August, 1914.

Smith, Mary Roberts, "Statistics of College and Non-college Women," Quarterly Pubs. of the American Statistical Assn., VII, p. 1 ff., 1900.

"Statistics of Eminent Women," Pop. Sci. Mo., junio de 1913.

"Marriage of College Women," Century Magazine, oct., 1895.

Blumer, J. O., en Journal of Heredity, VIII, p. 217, mayo de 1917.

Las estadísticas de esta y de las siguientes universidades del medio oeste fueron presentadas por Paul Popenoe en el Journal of Heredity, VIII, págs. 43-45.

Harvard Graduates' Magazine, XXV, No. 97, págs. 25-34, septiembre de 1916.

Popenoe, Paul, "Stanford's Marriage-Rate," Journal of Heredity, VIII, p. 170-173.