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Water-Quality Trends in the Nation's Rivers

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Science  27 Mar 1987:
Vol. 235, Issue 4796, pp. 1607-1615
DOI: 10.1126/science.235.4796.1607

Article Information

vol. 235 no. 4796 1607-1615

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Author Information

  1. RICHARD A. SMITH1,
  2. RICHARD B. ALEXANDER2,
  3. M. GORDON WOLMAN3
  1. 1Hydrologist at the U.S. Geological Survey, Reston, VA 22092.
  2. 2Physical scientist at the U.S. Geological Survey, Reston, VA 22092.
  3. 3Chairman of the Department of Geography and Environmental Engineering, The Johns Hopkins University, Baltimore, MD 21218.

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