1. Bell, A. E., & Aftanas, M. S. Some correlates of reading retardation. Perceptual and Motor Skills, 1972, 15, 659–667.
2. Bond, G. L., & Tinker, M. A. Reading difficulties; Their diagnosis and correation. New York: Appleton-Century-Crofts, 1967.
3. Eisenberg, L. Clinical considerations in the psychiatric evaluation of intelligence. In J. Zubin and G. A. Jervis (Eds.), Psychopathology of mental development. New York: Grune and Stratton, 1967.
4. Hagin, R. A., & Silver, A. A. Learning disability: Definition, diagnosis, and prevention. New York University Education Quarterly, 1977, 8, 9–16.
5. Hagin, R. A., Silver, A. A., & Corwin, C. G. Clinical diagnostic use of the WPPSI in predicting learning disabilities in grade one. Journal of Special Education, 1972, 5, 221–232.