000 00245nam a2200109Ia 4500
008 240421s9999 xx 000 0 und d
100 _aShukla, C.S.
245 0 _aScience Teaching
260 _aMeerut
_bIPH
_c2007
300 _a309p.
942 _cBK
999 _c11899
_d11899