See BegabMichael J., The Mentally Retarded Child: A Guide to Services of Social Agencies, Children's Bureau Publication No. 404, U.S. Department of Health, Education, and Welfare, Washington, D.C., 1963.
2.
See GoldfarbWilliam, “The Effects of Early Institutional Care on Adolescent Personality,”Journal of Experimental Education, Vol. XII, December 1943, pp. 106–29, and J. Tizard, “Residential Care of Mentally Handicapped Children,” British Medical Journal, April 2, 1960, pp. 1041–46.