00449nam a2200157Ia 4500008004100000020001500041082001700056100002100073245005800094260004800152300000800200650001400208650002000222653002400242653002500266170901s1969    xx            000 0 und d  a0132042304  a372.19bH57D  aHerman, Jerry J. 0aDeveloping an Effective Elementary Science Curriculum  aNew JerseybParker Publishing Companyc1969  a243  aEducation  aSocial sciences  aCurriculum planning  aElementary education