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Google圖書搜尋
Identifying Changes in Tree Form for Harvested Ponderosa Pine in the Black Hills
Michael S. Williams
出版
U.S. Department of Agriculture, Forest Service, Rocky Mountain Forest and Range Experiment Station
, 1996
URL
http://books.google.com.hk/books?id=GK_wzAEACAAJ&hl=&source=gbs_api