Boyer, C.W., Davis, H., Mann, L., Metz, C.M. & Wolford, B.Child service demonstration centers: Retrospect of an age. Academic Therapy, 1982, Vol. 18, No. 2, pp. 171–177.
2.
Keogh, B.K.Marker variables: A search for comparability and generalizability in the field of learning disabilities. Learning Disability Quarterly, 1978, Volume No. 3, pp. 5–11.
3.
Kirk, S.A.Learning disabilities: A historical note. Academic Therapy, Vol. 17, No. 1. September I, 1981.
4.
Thurlow, M.L. & Ysseldyke. J.E.Current assessment and decision-making practices in model LD programs. Learning Disabilities Quarterly, 1979, Volume No. 4, pp. 15–24.