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Dunn L.M. Special Education for the mildly retarded-is much of it justifiable? Exceptional Children, 1968, 35, 5–22.

Eaton M.D. , & Lovitt T.C. Achievement tests vs. direct and daily measurement. In Semb G. (Ed.) Behavior analysis and education. Lawrence, Kansas: University of Kansas, 1972.

Hersen M. , & Barlow D. Single case experimental design: strategies for studying behavior change. Elmsford, N.Y.: Pergamon Press, in press.

MacMillan D.L. , Jones R.L. , & Meyers C.E. Mainstreaming the mildly retarded: some questions, cautions, and guidelines. Mental Retardation, 1976, 14, 3–10.

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Ulman J. , & Sulzer-Azaroff B. Multielement baseline design in educational research. In Ramp E. , & Semb G. (Eds.) Behavior analysis: areas of research and application. Englewood Cliffs, N.J.: Prentice-Hall, 1975.