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32. Concentrations and loads of suspended sediment and nutrients in surface water of the Yakima River basin, Washington, 1999-2000 : with an analysis of trends in concentrations
33. Concentrations of dissolved oxygen in the lower Puyallup and White Rivers, Washington, August and September 2000 and 2001
34. Concentrations of dissolved solids and nutrients in water sources and selected streams of the Santa Ana Basin, California, October 1998-September 2001
35. Concentrations of Escherichia coli in streams in the Ohio River Watershed in Indiana, May-August 2000
36. Concentrations of polynuclear aromatic hydrocarbons and inorganic constituents in ambient surface soils, Chicago, Illinois, 2001-02
37. Conceptual hydrogeologic framework of the shallow aquifer system at Virginia Beach, Virginia
38. Conjunctive-use optimization model and sustainable-yield estimation for the Sparta aquifer of southeastern Arkansas and north-central Louisiana
39. Conjunctive-use optimization model of the Mississippi River Valley alluvial aquifer of northeastern Arkansas
40. Conjunctive-use optimization model of the Mississippi River Valley alluvial aquifer of southeastern Arkansas
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