M.J. Luessen D. S. Hovorka J.L. Plesha V. J. S. Grauch Harlan Barton H. D. King D.O. Capstick R. T. Mayerle A. R. Buehler P. N. Gabby Eugene E. Foord 1987 application/pdf 10.3133/b1719F en U.S. G.P.O., Mineral resources of the Owyhee Canyon and South Fork Owyhee River Wilderness Study Areas, Elko County, Nevada, and Owyhee County, Idaho reports