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Google圖書搜尋
Financial Precommercial Thinning Guides for Northwest Ponderosa Pine Stands
Robert W. Sassaman
James Willis Barrett
Asa D. Twombley
出版
Department of Agriculture, Forest Service, Pacific Northwest Forest and Range Experiment Station
, 1977
URL
http://books.google.com.hk/books?id=Gl1gvgEACAAJ&hl=&source=gbs_api