http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Henry Gannett, chief topographer ; E.M. Douglas, topographer in charge ; triangulation by R.U. Goode ; topography by W.J. Lloyd ; surveyed in 1896 ; engraved Nov. 1896 by U.S.G.S.
"U.S. Geological Survey, Charles D. Walcott, director."
Relief indicated by contours and spot heights.
Verso: text "Description of the topographic maps of the United States", and standard symbols used.