Kirk, S.A.1981. Learning disabilities: a historical note. Academic Therapy, 17:1, pp. 5–11.
2.
Kirk, S. A., Elkin, J.1975. Characteristics of children enrolled in the child service demonstration centers. Journal of Learning Disabilities, 8:10, pp. 630–637.
3.
Mann, L.1979. On the trail of process. New York: Grune & Stratton, Inc.
4.
Mann, L.1980. The wax block metaphor: Plato's views on learning disabilities, Journal of Learning Disabilities, 13:8.
