'Edition of Mar. 1908, reprinted 1951.' 'E.M. Douglas, geographer in charge; Topography and triangulation by R.H. Chapman, B.D. Stewart, J.E. Blackburn, and D.F.C. Moor. Surveyed in 1906-1907.' Scale 1:250,000 ; polyconic proj. (W 116°00--W 115°00/N 37°00--N 36°00). Relief shown by contours and spot heights. Title in lower-right corner: Nev.-Calif., Las Vegas. Contour interval 100 feet. Datum is mean sea level. U.S. Geological Survey
58 x 46 cm., on sheet 77 x 83 cm., folded in envelope 30 x 24 cm. Relief shown by contours and spot heights. "Geology mapped in 1961." Includes description of map units, col. cross section, and quadrangle location map. "Prepared in cooperation with the U. S. Atomic Commission." Original publisher: Interior, Geological Survey, Series: Geologic quadrangle map GQ, Scale: 1:24 000.