http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Status and progress of topographic mapping (7 1/2 and 15 minute series)
In upper margin: Department of the Interior, U.S. Geological Survey, National Mapping Program.
Includes insets of Alaska, Puerto Rico and Virgin Islands, American Samoa, Guam, and Hawaii.
National Cartographic Information Center, U.S. Geological Survey, 507 National Center, Reston, VA 22092