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020			_a0071152423 _c _17.95
040			_aMAIN
041			_aEnglish
082			_a333.9104 _bCHA
100			_aChapra, Steven C.
245		0	_aSurface water-quality modeling
260			_aNew York _b; Mcgraw-Hill _c, 1997
300			_axix,844p.
650			_aEconomics
942			_cBK
999			_c126431 _d126431