00986cam a22002291 4500 hew66000071 DLC 20260227111515.0 750723s1966 dcu f000 0 eng c hew66000071 (OCoLC)1469114 U.S. Dept. of Health, Education, and Welfare. Library ATrT MdU-H OCoLC DLC HQ768 .U65 no. 1 1966 United States. Children's Bureau. Research relating to mentally retarded children. [Rev.] Washington, For sale by the Superintendent of Documents, U.S. Govt. Print. Off. [1966] 126 p. 26 cm. United States. Children's Bureau. Research relating to special groups of children no. 1 "A listing of all research projects on mental retardation ... reported to the Children's Bureau Clearing House for Research in Child Life since 1949." Children with mental disabilities Bibliography. 34615 34615