The conservation message in America : a content analysis of periodicals of four major American conservation organizations from 1935 to 1968

Author(s)
    • Morrison, Douglas A.
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The conservation message in America : a content analysis of periodicals of four major American conservation organizations from 1935 to 1968

Douglas Allen Morrison

[University of Oregon], 1970

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Thesis (Ph. D.)--University of Oregon, [Eugene] , 1969

***記述は遡及データによる

Bibliography: leaves 223-230

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