Bloom, B.S.: Stability and Change in Human Characteristics. New York , Wiley, 1964.
2.
Burt, C.: The Causes and Treatment of Backwardness. London, University of London Press, 1953.
3.
Douglas, J.W.B.: The Home and the School. London, MacGibbon and Kee, 1964.
4.
Drillien, C.M.: The Growth and Development of the Prematurely Born Infant. Edinburgh, Living-stone, 1963.
5.
Illingworth, R.S. and Lister, J.: The critical or sensitive period, with special reference to certain feeding problems in infants and children. J. Pediat.65: 839, 1964.
6.
Radin, S.S. and Masling, J.: Tom, a gifted underachieving child. J. Child Psychol. Psychiat.4; 183, 1963.
