000 00345nam a2200157Ia 4500
008 180323s9999 xx 000 0 und d
082 _a507.1
100 _aSrivastava
245 0 _aTeaching of science
250 _a1st
260 _aMeerut
_bMeerut
_c2007
300 _a208
500 _a3567
650 _aTeaching - Science
942 _cBOOK
999 _c9374
_d9374