http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
1 map : color ; 39 x 45 cm., on sheet 46 x 71 cm.
produced by the United States Geological Survey in cooperation with state of Illinois agencies.
Compiled from USGS 1:24 000-scale topographic maps dated 1964-1985. Planimetry revised from aerial photographs taken 1983-85 and other source data. Map edited 1987.
Includes "Location diagram" and "Index to 1:24 000-scale maps."
Designed to be folded to approximately 21 x 11 cm.
Scale 1:100,000. 1 cm. on the map represents 1 km. on the ground ;