Miscellaneous land conveyances, studies, boundary changes, and exchanges : hearing before the Subcommittee on Public Lands and Reserved Water of the Committee on Energy and Natural Resources, United States Senate, Ninety-seventh Congress, first session on S. 146, S. 187, S. 188, S. 512, S. 634, S. 656, S. 763, S. 764, S. 794, H.R. 618, June 24, 1981