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  1. 1
    Published 1998
    Subjects “...Water quality management Europe, Eastern Congresses....”
    Conference Proceeding Book
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    Environmentally devastated areas in river basins in Eastern Europe /
  2. 2
    Published 1979
    Subjects “...Water quality management United States Congresses....”
    Book
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    Best management practices for agriculture and silviculture : proceedings of the 1978 Cornell Agricultural Waste Management Conference /

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