Problems of Method in Maturity and Curricular Studies

Burk C. F. “The collecting instinct.” Pedagogical Seminary, 7: 1900, 179–207.

Davis Edith A. “The Development of Linguistic Skill in Twins, Singletons with Siblings, and Only Children.” Institute of Child Welfare Monograph, No. XIV. (Minneapolis: University of Minnesota Press, 1937. 165 pp.)

Deutsche Jean Marquis . “The Development of Children's Concepts of Causal Relations.” Institute of Child Welfare Monograph, No. XIII. (Minneapolis: University of Minnesota Press, 1937. 104 pp.)

Fisher R. A. The Design of Experiments. (Edinburgh: Oliver and Boyd, 2d ed., 1937. 260 pp.)

Fisher R. A. Statistical Methods for Research Workers. (Edinburgh: Oliver and Boyd, 6th ed., 1936. 339 pp.)

Lehman H. C. , and Witty Paul A. The Psychology of Play Activities. (New York: A. S. Barnes and Co., 1927. 242 pp.)

McGraw Myrtle B. Growth, a Study of Johnny and Jimmy. (New York: D. Appleton-Century Co., 1935. 319 pp.)