Showing 1 - 11 results of 11 for search '"United States."', query time: 0.20s Refine Results
  1. 1
    Stream water quality in the conterminous United States--status and trends of selected indicators during the 1980's.
    by Smith, Richard A., 1945-
    Published 1994
    Subjects: “...Water quality United States....”
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    Government Document eBook
  2. 2
    Regional estimates of the amount of U.S. agricultural land located in watersheds with poor water quality.
    by Smith, Richard A.
    Published 1994
    Subjects: “...Watersheds United States....”
    Government Document Microform Book
  3. 3
    Evidence for acid-precipitation-induced trends in stream chemistry at hydrologic bench-mark stations /
    by Smith, Richard A.
    Published 1983
    Subjects: “...Acid rain United States....”
    Government Document Book
  4. 4
    A study of trends in dissolved oxygen and fecal coliform bacteria at NASQAN stations /
    by Smith, Richard A.
    Published 1982
    Subjects: “...Water quality United States....”
    Government Document Book
  5. 5
    County-level estimates of nitrogen and phosphorus fertilizer use in the United States, 1945 to 1985 /
    by Alexander, Richard B.
    Published 1990
    Subjects: “...Nitrogen fertilizers United States....”
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    Government Document Microform Book
  6. 6
    Analysis and interpretation of water-quality trends in major U.S. rivers, 1974-81 /
    by Smith, Richard A.
    Published 1987
    Subjects: “...Water quality United States....”
    Government Document Book
  7. 7
    Regional assessments of the nation's water quality : improved understanding of stream nutrient sources through enhanced modeling capabilities /
    by Preston, Stephen D., 1955-
    Published 2011
    Subjects: “...Water quality United States....”
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    Government Document eBook
  8. 8
    Pesticides in the nation's rivers, 1975-1980, and implications for future monitoring /
    by Gilliom, Robert J.
    Published 1985
    Subjects: “...Pesticides Environmental aspects United States....”
    Government Document Book
  9. 9
    Data from selected U.S. Geological Survey national stream water-quality monitoring networks (WQN) : CD-ROMs /
    Published 1996
    Subjects: “...Water quality United States Databases....”
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    Government Document Software eBook
  10. 10
    Data from selected U.S. Geological Survey national stream water-quality monitoring networks (WQN) on CD-ROM.
    Published 1997
    Subjects: “...Water quality United States Databases....”
    Get full text
    Government Document Book
  11. 11
    Data from selected U.S. Geological Survey national stream water-Quality Monitoring Networks (WQN) on CD-ROM /
    Published 1996
    Subjects: “...Water quality monitoring stations United States Databases....”
    Get full text
    Government Document Book
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