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  1. 1
    by Kupchella, Charles E.
    Published 1993
    Book

    Environmental science living with in the system of nature.
  2. 2
    by Kupchella, Charles E.
    Published 1993
    Book

    Environmental science living within the system of nature
  3. 3
    by Ethoven, Alain C. 1930-
    Published 1973
    Book

    Pollution, resources, and the environment
  4. 4
    Book

    The earth and human affairs.
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