4 results Refine Results
  1. 1
    by McHenry, Robert
    Published 1972
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    A documentary history of conservation in America /
  2. 2
    by Johnson, Paul S.
    Published 2009
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    The ecology and silviculture of oaks /
  3. 3
    Published 1985
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    Integrated pest management in pine-bark beetle ecosystems /
  4. 4
    by Owen, Oliver S., 1920-
    Published 1971
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    Natural resource conservation : an ecological approach /

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