'Base by U.S. Geological Survey, 1952.' 'Interior--Geological Survey, Washington, D.C.--1965--W63358.' 'Compiled from data published by Carpenter (1915), Kearney (1913), and McWilliams (1913).' Relief shown by contours. Includes township and range lines. Scale 1:62,500 (W 115°15´--W 115°00´/N 36°15´--N 36°00´). Series: Water-supply paper (Washington, D.C.) 1780. Originally published as plate 7 of Available water supply of the Las Vegas ground-water basin, Nevada, by Glenn T. Malmberg, published by the Geological Survey in 1965 as its Water-supply paper 1780.