1.

図書
図書
1. Repairing paradise : the restoration of nature in America's national parks
William R. Lowry
出版情報: Washington, D.C. : Brookings Institution Press, 2012
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2.

図書
図書
2. A Sand County almanac : with essays on conservation from Round River. 1st Ballantine Book ed
Aldo Leopold ; illustrated by Charles W. Schwartz
出版情報: New York : Ballantine Books, 1970
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3.

図書
図書
3. Wilderness and the American mind. 3rd ed
Roderick Nash
出版情報: New Haven, Conn. : Yale University Press, c1982
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