http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Index to digital line graphs (DLG) from 1:24,000-scale maps and digital elevation model (DEM) data
2 maps on 1 sheet : both sides, color ; 78 x 121 cm
Digital line graph (DLG) data -- Digital terrain data.
Includes insets of Alaska, American Samoa, Guam, Hawaii, Puerto Rico and Virgin Islands.