Miscellaneous national park, national historic trails and wild and scenic rivers bills : hearing before the Subcommittee on Public Lands, National Parks, and Forests of the Committee on Energy and Natural Resources, United States Senate, One Hundred First Congress, second session, on S. 456, H.R. 1109, S. 465, H.R. 1159, S. 1756, S. 1770, S. 1864, H.R. 76, S. 2059, and S. 2208, Wednesday, March 28, 1990