National trails bills : hearing before the Subcommittee on National Parks of the Committee on Energy and Natural Resources, United States Senate, One Hundred Seventh Congress, second session on S. 213, S. 1069, S. 1946, H.R. 37, H.R 834, H.R. 1384, March 7, 2002.
Coverage: Washington : U.S. G.P.O. : 2002.