Geologic and water-supply reports and maps :
Virginia.

APA Citation

Geological Survey (U.S.). (1976). Geologic and water-supply reports and maps: Virginia. [Washington]: United States, Dept. of the Interior, Geological Survey.

MLA Citation

Geological Survey (U.S.). Geologic And Water-supply Reports And Maps: Virginia. [Washington]: United States, Dept. of the Interior, Geological Survey, 1976.

Warning: These citations may not always be complete (especially for serials).