AserlindL.Research and instructional materials for the mentally retarded. In International Association for the Scientific Study of Mental Deficiency, Proceedings of the International Association for the Scientific Study of Mental Deficiency.Amsterdam: Excerpta Medica Foundation, 1968 (in press).
2.
McCarthyJ.Educational materials for the mentally retarded: A quandry.Education and Training of the Mentally Retarded, 1966, 1, 24–31.