http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Geologic map of the Potomac River Gorge, Great Falls Park, Virginia, and part of the C & O Canal National Historical Park, Maryland
1 computer optical disc : color illustrations, color maps ; 4 3/4 in.
U.S. Department of the Interior, U.S. Geological Survey ; compilation by Scott Southworth, Carrie Fingeret, and Thomas Weik ; prepared in cooperation with the National Park Service.
System requirements: Windows 95, 98, or NT environment with ArcInfo for map data manipulation and Adobe Acrobat Reader for viewing.
Chesapeake and Ohio Canal National Historical Park
Great Falls of the Potomac (Md. and Va.)
U.S. Geological Survey open-file report ; 00-264