GAO's study of the national park system : joint hearing before the Subcommittee on Parks, Historic Preservation, and Recreation of the Senate Committee on Energy and Natural Resources and the Subcommittee on National Parks, Forests, and Lands of the House Committee on Resources, One Hundred Fourth Congress, first session, on the General Accounting Office's study of the national park system, March 7, 1995
Washington : U.S. Government Printing Office : For sale by the U.S. Government Printing Office, Superintendent of Documents, Congressional Sales Office, 1995