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  1. 1
    by Yapp, W B
    Published 1972
    Book

    Production, pollution, protection
  2. 2
    by Commoner, Barry 1917-
    Published 1971
    Book

    The closing circle : nature, man, and technology
  3. 3
    by Detwyler, Thomas R 1938-
    Published 1971
    Book

    Man's impact on environment
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