00376nam a22000977a 4500100001900000245006800019260005900087942001200146999001900158952010100177  aBijumole , P C  aEffectiveness of concept attainment............................  aTrivandrum:bDept of Education, Uty of Kerala, c1997.  2ddccPD  c711999d711999  00102ddc40718CRaEDUbEDUcREFd2024-02-19l0pEDU16297r2024-02-19 06:59:26w2024-02-19yPD