"United States" . . . . . . . . . . . "Management and disposal of hazardous materials by government agencies : hearing before the Environment, Energy, and Natural Resources Subcommittee of the Committee on Government Operations, House of Representatives, One Hundred First Congress, second session, February 13, 1990" . . . . . . . . . . "Management and disposal of hazardous materials by government agencies hearing before the Environment, Energy, and Natural Resources Subcommittee of the Committee on Government Operations, House of Representatives, One Hundred First Congress, second session, February 13, 1990"@en . . . . . . . . . .