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Google圖書搜尋
Fifty-year Development of Douglas-fir Stands Planted at Various Spacings
Donald L. Reukema
出版
Department of Agriculture, Forest Service, Pacific Northwest Forest and Range Experiment Station
, 1979
URL
http://books.google.com.hk/books?id=_-YIl70BuHAC&hl=&source=gbs_api
EBook
FULL_PUBLIC_DOMAIN