Hearing Before the Subcommittee on Public Lands, National Parks, and Forests of the Committee on Energy and Natural Resources, United States Senate, One Hundred Second Congress, First Session on S. 52 and H.R. 1143; S. 550; S. 638 and H.R. 749; S. 639 and H.R. 904; S. 663; S. 749; S. 996; H.R. 427; and H.R. 690, May 21, 1991