00986cam a22002291  4500001001300000003000400013005001700017008004100034010001700075035001900092040008300111050002700194110003900221245005300260250001100313260009300324300001900417410009500436500015500531650005300686999001700739hew66000071 DLC20260227111515.0750723s1966    dcu          f000 0 eng c  ahew66000071   a(OCoLC)1469114  aU.S. Dept. of Health, Education, and Welfare. LibrarycATrTdMdU-HdOCoLCdDLC00aHQ768b.U65 no. 1 19661 aUnited States.bChildren's Bureau.10aResearch relating to mentally retarded children.  a[Rev.]  aWashington,bFor sale by the Superintendent of Documents, U.S. Govt. Print. Off.c[1966]  a126 p.c26 cm.10aUnited States.bChildren's Bureau.tResearch relating to special groups of childrenvno. 1  a"A listing of all research projects on mental retardation ... reported to the Children's Bureau Clearing House for Research in Child Life since 1949." 0aChildren with mental disabilitiesvBibliography.  c34615d34615