000 00279nam a2200133Ia 4500
100 _aYadav, M.S.
365 _b250
942 _cBK
654 _a
245 _aTeaching of science
260 _aNew Delhi
_bAnmol Publications
_c1992
082 _a375.5
300 _bHb
_avii,240
999 _c396090
_d396090
041 _aeng