TY - BOOK ED - United States. TI - Research relating to mentally retarded children AV - HQ768 .U65 no. 1 1966 PY - 1966///] CY - Washington PB - For sale by the Superintendent of Documents, U.S. Govt. Print. Off. KW - Children with mental disabilities KW - Bibliography N1 - "A listing of all research projects on mental retardation ... reported to the Children's Bureau Clearing House for Research in Child Life since 1949." ER -