1. Infants at risk of handicapping conditions;Sheridan M. D.;Mth. Bull. Minist. Hlth,1962
2. Toward a greater understanding of the parentsof the mentally retarded child
3. Rational diagnostic evaluation of the child with mental deficiency;Smith D. W.;Amer. J. Dis. Child.,1975
4. SOME WIDER IMPLICATIONS OF RETARDATION