HarrisD. S.Children's drawings as measures of intellectual maturity.New York: Harcourt, Brace and World, 1963.
2.
KeoghBarbara K., and KeoghJ. F.Pattern copying and pattern walking performance of normal and educationally subnormal boys.American Journal of Mental Deficiency, 1967, 71, 1009–1013.
3.
KoppitzElizabeth M.The Bender-Gestalt test for young children.New York: Grunc and Stratton, 1964.