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020 _a8174506365
041 _aeng
082 _a530
_bUPP
100 _aUppal,S
245 _aScience
_cBy Shweta Uppal
250 _aLatest Ed
260 _aNew Delhi
_bNCERT
_c2006
300 _a282P
650 _aScience
942 _cBK
999 _c1984
_d1984