Umiat special, Alaska /
Geological Survey (U.S.)
[Washington, D.C.] : U.S. Dept. of the Interior, Geological Survey,
[1948]
Relief shown by contours and spot heights.
"Reconnaissance topography from aerial photographs by photo-alidade methods and by plane-table surveys, 1946. Aerial photographs taken 1945."
"Datum is approximately mean sea level."
At head of title: United States Department of the Navy. Naval Petroleum Reserves.