EDUCATIONAL POLICIES COMMISSION.Education of the Gifted, Washington, D. C.: National Education Association, 1950.
2.
HollingworthLeta S.Gifted Children, Their Nature and Nurture, New York: The Macmillan Company, 1927.
3.
PegnatoCARL. An Evaluation of Various Initial Methods of Selecting Intellectually Gifted Children at the Junior High School Level. Doctoral Thesis, Pennsylvania State College, 1958.
4.
TermanLewis M., AND OTHERS. Genetic Studies of Genius, Volumes I-II-III-IV. Stanford, California: Stanford University Press, 1925 through 1947.
