Hearing on H.R. 588, to amend the National Trails System Act to create a new category of long-distance trails to be known as National Discovery Trails, to authorize the American Discovery Trail as the first trail in that category, and for other purposes; and H.R. 1513 a bill to amend the National Trails System Act to designate the Lincoln National Historic Trail as a component of the National Trails System : hearing before the Subcommittee on National Parks and Public Lands of the Committee on Resources, House of Representatives, One Hundred Fifth Congress, first session ... June 10, 1997, Washington, DC.