Christoplos, F.: Keeping exceptional children in regular classes.Exceptional Children, 1973, 39, 569–571.
2.
Croth, R.I., Whelan, R.J., Stables, J.M.: Teacher application of behavior principles in home and classroom environments.Focus on Exceptional Children, 1970, 1, 7.
3.
Findley, W.J., Bryan, M.M.: Ability grouping: 1970. Athens, Ga.: Center for Educational Improvement, University of Georgia, 1971.
4.
Glass, R.M., Griffin, J.B.: Affective education for the inservice elementary and special education teacher. Bloomington, Ind.: Center for Innovation in Teaching the Handicapped, 1973.
5.
Niedermeyer, F.C., Ellis, P.: Remedial reading instruction by trained pupil tutors.Elementary School Journal, 1971, 71, 400–496.