Nutrients in ground water and surface water of the United States; an analysis of data through 1992
Elisabeth A. Scribner
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Julie E. Dietze
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Michael Thurman
Janet M. Carter
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Gregory C. Delzer
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James A. Kingsbury
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Jessica A. Hopple
Alan H. Welch
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Sharon A. Watkins
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Dennis R. Helsel
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Michael J. Focazio
Jennie L. Ridgley
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Karen J. Wenrich-Verbeek
David J. Varnes
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Glenn R. Scott
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W.D.E. Cardwell
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E.D. Jenkins