Reconnaissance map of Rampart quadrangle, Yukon-Tanana region, Alaska /
Geological Survey (U.S.)
Brooks, Alfred H.(Alfred Hulse),1871-1924.
[Washington] : The Survey,
1909.
Relief shown by contours and spot heights.
"Topography and triangulation by D.C. Witherspoon and R.B. Oliver".
"Surveyed in 1906".