000 00276nam a22001097a 4500
020 _a8171414249
082 _a510.71
_bPRA.C
100 _aPrabhakaram, K S
245 _aConcept attainment model in mathematics teaching
260 _aNew Delhi:
_bDiscovery;
_c1998
942 _cBK
999 _c325960
_d325960