000 00292nam a2200121Ia 4500
999 _c7938
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100 _aMAHESHWARI,V.K.
245 0 _aTEACHING OF SCIENCE
260 _c2013
_aMEERUT
_bR.LALL BOOKS
300 _a424p.
942 _cBK
_2ddc