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020 _c48
040 _aMAIN
041 _aEnglish
082 _a540
_bDAS
100 _aDas, Ranajit
245 _aan introduction to chemistry
250 _a5th ed.
260 _aCalcutta
_b; Oriental Book
_c, 1987
300 _axv,307p.xix
_b, V.1;P.1
650 _aChemistry
942 _cBK
999 _c22910
_d22910