http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
A.H. Thompson, geographer ; R.U. Goode, geographer in charge ; triangulation by Chas. F. Urquhart ; topography by R.O. Gordon ; surveyed in 1891.
"Contour interval 25 feet. Dantum is mean sea level."
Relief indicated by contours and spot heights.
Verso: text "The topographic maps of the United States", and standard symbols used.