De Soto Expedition Trail Commission; sale of certain federal lands, Clark County, NV; and establishing the Blackstone River Valley Heritage Corridor Commission : 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, first session, on S. 555 ... S. 624 ... S. 830 ... June 8, 1989. (U.S. G.P.O., 1989)