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999 _c15535
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082 _a540
_bM678q
090 _aCOLECCION GENERAL
041 0 _aeng
100 1 _aMortimer, Charles E.
245 1 _aChemistry a conceptual approach /
_cCharles E. Mortimer
260 _bReinhold Book
_c1983
_aNew York, us
300 _a692
650 0 7 _aQUIMICA
942 _2ddc
_cBK