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  1. 1
    由 Schrepfer, Susan R.
    出版 1983
    图书
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    The fight to save the redwoods : a history of environmental reform, 1917-1978 /
  2. 2
    出版 1990
    图书
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    Three-state impact of spotted owl conservation and other timber harvest reductions : a cooperative evaluation of the economic and social impacts : based on independent studies at University of Washington, University of California, Oregon State University.

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