Protection, management, and control of wild free-roaming horses and burros : hearings before the Subcommittee on Public Lands and Reserved Water of the Committee on Energy and Natural Resources, United States Senate, Ninety-eighth Congress, first session, on S. 457 ... Rock Springs, Wyo., March 19, 1983; Washington, D.C., April 11, 1983. (U.S. G.P.O., 1983)