000 00262nam a2200109Ia 4500
008 230210s9999 xx 000 0 und d
100 _aMAHESHWARI V.K.
_918270
245 0 _aTEACHING OF SCIENCE
260 _bR.LAL BOOK DEPO
_c2010
300 _a363
942 _cBK
999 _c117356
_d117356