000 00285nam a2200109Ia 4500
008 220321s9999 xx 000 0 und d
100 _aSiddiqui Mjibul Hasan
245 0 _aResearch in teaching of Science & Mathematics
260 _aDelhi, A.P.H Pub
_c2013
300 _a310
942 _cRF
999 _c9927
_d9927