http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
1:100,000-scale topographic map : 30 x 60 minute series (topographic)
edited and published by the Bureau of Land Management National Operations Center in cooperation with the Bureau of Land Management Montana State Office.
Relief shown by contours and spot heights.
Includes text, quadrangle location map, township diagram, and indexes to adjoining maps and to 1:24,000-scale maps.