Nevada (Nye County), Bullfrog special map.
Geological Survey (U.S.)
[Washington, D.C.] : U.S. Geological Survey,
[1906]
Relief shown by contours and spot heights.
"E.M. Douglas, Geographer. R.H. Chapman, in charge of section. Topography by Wm. Stranahan. Triangulation by B.D. Stewart. Surveyed in 1905."
"Datum is mean sea level."