1. Education of the Handicapped Act Amendments, 1986;Federal Register,1989
2. British and American recommendations for developmental monitoring: the role of surveillance;Dworkin;Pediatrics,1989
3. Conditions associated with the mother's estimate of the ability of her retarded child;Ewert;Am J Ment Deficiency,1957
4. Parents' estimate of the intelligence of retarded children;Schulman;Am J Ment Deficiency,1959
5. Parental estimation of developmental level;Keshavan;Am J Dis Child,1983