http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Prince William County, cities of Manassas and Manassas Park, Virginia
1 map : both sides, color ; on sheet 69 x 111 cm.
produced by the United States Geological Survey in cooperation with commonwealth of Virginia agencies ; commonwealth of Virginia, Division of Mineral Resources.
Relief shown by contours and spot heights.
"Compiled from USGS 1:24 000-scale maps dated 1965-1983, planimetry revised from aerial photographs taken 1981 and other source data, map edited 1987."
North section (recto) -- South section (verso).
Includes "Location diagram" and "Index to 1:24 000-scale maps."
Scale 1:50,000. 1 cm. on the map represents 500 m. on the ground ;