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082 _a545.812 S671
100 _aSNELL.F.D
245 0 _aCOLORIMETRIC METHODS OF ANALYSIS
250 _a3
260 _aNEW YORK
_bVan Nostrand Reinhold
_c1961
300 _a23X15
942 _cBK
_2DDC
999 _c10528
_d10528