1. American Psychiatric Association. (1980).Diagnostic and statistical manual of mental disorders (3rd ed.). Washington, DC: Author.
2. Bagnato, S. J., & Neisworth, J. T. (1980). The intervention efficiency index: An approach to preschool program accountability.Exceptional Children, 46, 264–269.
3. Beckman, P. J., & Kohl, F. L. (1987). Interactions of preschoolers with and without handicaps in integrated and segregated settings: A longitudinal study.Mental Retardation, 25, 5–11.
4. Dunn, L. M., & Dunn, L. M. (1981).Peabody Picture Vocabulary Test-Revised. Circle Pines MN: American Guidance Service.
5. Handleman, J. S. (1979). Transition of autistic-type children from highly specialized programs to more “normal” educational environments.Journal for Special Education, 15, 273–279.