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090 _aLibros
020 _a0-03-070744-7
041 0 _aesp
100 1 _aMasterton, William L.
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700 1 _aSlowinski, Emil J.
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700 1 _aStanitski,Conrad L.
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245 1 _aChemical principles /
_cWilliam L. Masterton
250 _a6a
260 _bSaunders College
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_aPhiladelphia,
300 _a861
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650 0 7 _aQUIMICA
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942 _2ddc
_cBK