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Constancy and Cover of Plants in the Petersburg and Wrangell Districts, Tongass National Forest, and Associated Private and Other Public Lands, Southeast Alaska
Bert R. Mead
出版U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station, 2002
URLhttp://books.google.com.hk/books?id=6otkKVaMJUwC&hl=&source=gbs_api
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