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Google圖書搜尋
Management of Spruce-fir in Even-aged Stands in the Central Rocky Mountains
Robert R. Alexander
出版
Rocky Mountain Forest and Range Experiment Station, Forest Service, U.S. Department of Agriculture
, 1980
URL
http://books.google.com.hk/books?id=5pBY0AEACAAJ&hl=&source=gbs_api