Potomac River basin : Clarke, Frederick, and Highland Counties, Virginia, Berkeley, Grant, Hampshire, Hardy, Jefferson, Mineral, Morgan, and Pendleton Counties, West Virginia : mineral resources

In upper margin: Figure VI-7.
Appears in W.Va. Dept. of Natural Resources' Comprehensive study of the Potomac River basin.
"Sources: West Virginia Department of Natural Resources, Virginia Department of Conservation & Economic Development."
"October 1978."
Includes location map.
"13,623."
Available also through the Library of Congress Web site as a raster image.