Blatt, B., & Garfunkel, F.Teaching the mentally retarded. In R. M. W. Travers (Ed.) Second handbook of research on teaching . Chicago: Rand-McNally, 1973.
2.
Dunn, L.M.Special education for the mildly-retarded-Is much of it justified ? Exceptional, 1968, 35, 5-24.
3.
Elstein, A.S.Clinical judgment: psychological research and medical practice. Science, 1976, 194 (4266), 696-700.
4.
Hertzberg, H.W.Competency based teacher education: Does it have a past or a future ? Teachers College Record, 1976, 78, 1-21.
5.
Hewett, F., & Blake, P.R.Teaching the emotionally disturbed. In R. M. W. Travers (Ed.) Second handbook of research on teaching . Chicago: Rand-McNally, 1973.
6.
Hunt, J.T.Mentally retarded children. In R. L. Ebel (Ed.), Encyclopedia of educational research, 4th Edition. New York: Macmillan, 1969.
7.
Kuhn, T.S.The structure of scientific revolutions. Chicago : University of Chicago Press, 1962.
8.
Meehl, P.E.Clinical versus statistical predictino. Minneapolis : University of Minnesota Press, 1954.
9.
Reynolds, M.C.Special education. In R. L. Ebel (Ed.), Encyclopedia of Educational Research, 4th Edition. New York: Macmillan , 1969.
