Ecosystem management : joint oversight hearing before the Subcommittee on Oversight and Investigations, Committee on Natural Resources, and the Subcommittee on Specialty Crops and Natural Resources, Committee on Agriculture, and the Subcommittee on Environment and Natural Resources, Committee on Merchant Marine and Fisheries, House of Representatives, One Hundred Third Congress, second session, on ecosystem management and a report by the General Accounting Office, "Ecosystem management--additional action is needed to adequately test a promising approach," hearing held in Washington, DC, September 20, 1994.