Forest Service's management policies and ecoregion assessments : oversight hearings before the Subcommittee on National Parks, Forests, and Lands of the Committee on Resources, House of Representatives, One Hundred Fourth Congress, second session, on Forest Service policies for river-management of the Green River and the Snake River, April 30, 1996--Washington, DC, Forest Service ecoregion assessments, May 21, 1996--Washington, DC