000 00460nam a2200157Ia 4500
008 160608s9999 xx 000 0 und d
020 _a8170542594
100 _aVaidya, Shobha
_9108522
245 _aEffect of mastery learning and concept attainment model on achievement, self -concept and attitude
260 _aNew Delhi
260 _bClassical
260 _c1997
300 _a205p
650 _aEducation
_9121
650 _aEductional psychology
_9108523
999 _c49363
_d49363