(帮助) "State of the World's Forests 2009" (页面存档备份,存于互联网档案馆). United Nations Food and Agriculture Organization. Facts about Tropical Timber (页面存档备份,存于互联网档案馆)
471(英语:Listof United States Supreme Court cases, volume 471) U.S. 539 (1985) fair use of copyrighted material Landreth Timber Co. v. Landreth 471(英语:List of