'United States Department of Interior, Geological Survey, Water Resources Bulletin No. 6.' 'State Engineer of Nevada.' Relief shown by contours. Includes township and range lines. Scale [ca. 1:126,720. 1 in.=approx. 2 miles]. Series: Water resources bulletin (Carson City, Nev.) no. 6. Originally published as plate 1 in Ground water in Las Vegas, Pahrump, and Indian Spring Valleys, Nevada : a summary / G. B. Maxey and T. W. Robinson, prepared in cooperation with the United States Department of the Interior, Geological Survey, and published as no. 6 of the Water resources bulletin.