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  1. 1

    Man's impact on environment by Detwyler, Thomas R. (Thomas Robert) 1938-

    Published 1971
    Book

    Man's impact on environment
  2. 2

    Man's impact on environment by Detwyler, Thomas R 1938-

    Published 1971
    Book

    Man's impact on environment
  3. 3

    Man's impact on environment by Detwyler, Thomas R.

    Published 1971
    Book

    Man's impact on environment

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