7United States Department of Agriculture(USDA).Sierra Nevada Forest Plan Amendment: Draft Environmental Impact Statement Volume 2 of 3 (Chapter 3)[R].USDA,Room 326-W, Whitten Building, 14th and Independence Avenue, SW, Washington, DC 20250-9410, 2000(4) :15-22.
8王雪.《林业建设与西部经济问题》[J].林业经济问题,2003,(5).
9Asia-Pacific Forestry Commission. Southeast Asian Forests and Forestry to 2020 [M]. Food and Agriculture Organization of the United Nations, Bangkok, 2011: 78-79.
10United States Department of Agriculture(USDA). Sierra Nevada Forest Plan Amendment: Draft Environmental Impact Statement Volume 2 of 3 [M]. Chapter 3. USDA, Room 326-W, Whitten Building, 14th and Independence Avenue, SW, Washington, DC 20250-9410, April 2000: 15-22.