Birch, H.G., and A. Lefford."Visual Differentiation, Inter-sensory Integration, and Voluntary Motor Control,"Monographs of the Society for Research in Child Development, XXXII (1967 ), 1-87.
2.
Kephart, N.C.The Slow Learner in the Classroom. Columbus, Ohio : Charles E. Merrill, 1960.
3.
Rappaport, S. A. (ed.). Childhood Aphasia and Brain Damage: A Definition. Narberth, Penn.: Livingston Publishing Co., 1964.
4.
Strauss, A.A., and Laura Lehtinen. Psychopathology and Education of the Brain-Injured Child . New York: Grune and Stratton , 1947.