Mount St. Helens national volcanic area : joint hearings before the Subcommittee on Forests, Family Farms, and Energy of the Committee on Agriculture and the Subcommittee on Public Lands and National Parks of the Committee on Interior and Insular Affairs, House of Representatives, Ninety-seventh Congress, second session, on H.R. 5281, H.R. 5773, H.R. 5787, March 11, 1982, Washington, D.C., April 3, 1982, Vancouver, Wash.