'T.E. Eakin, S.L. Schoff, and P. Cohen, 1963.' 'Department of the Interior, United States Geological Survey, TEI-833.' 'Prepared in cooperation with the U.S. Atomic Energy Commission.' Scale 1:500,000 (W 117°00´--W 115°00´/N 38°30´--N 36°30´). Originally published as figure 3 in Regional hydrology of a part of southern Nevada : a reconnaissance / by Thomas E. Eakin, Stuart L. Schoff, and Philip Cohen, published by the U.S. Geological Survey in 1963 as number 833 of the Trace elements investigation report.