000 00264nam a2200109Ia 4500
008 230125s9999 xx 000 0 und d
100 _aBHATNAGER A.B.
_916408
245 0 _aTEACHING OF SCIENCES
260 _bSURYA PUBLICATION
_c2008
300 _a491
942 _cBK
999 _c113860
_d113860