H.R. 1635, H.R. 755, H.R. 1718, and H.R. 708 : hearing before the Subcommittee on National Parks and Public Lands of the Committee on Resources, House of Representatives, One Hundred Fifth Congress, first session on H.R. 1635, to establish within the United States National Park Service the National Underground Railroad Network to Freedom Program, and for other purposes. H.R. 755, to amend the Internal Revenue Code of 1986 to allow individuals to designate any portion of their income tax overpayments, and to make other contributions, for the benefit of units of the National Park System. H.R. 1718, to provide for the conveyance of certain lands in Wyoming to the County of Park, Wyoming. H.R. 708, to require the Secretary of the Interior to conduct a study concerning grazing use of certain land within and adjacent to Grand Teton National Park, Wyoming, and to extend temporarily certain grazing privileges, July 22, 1997--Washington, DC.