@book{193923,
	author = {Swain, Lindsay A. and Mesko, Thomas O.},
	title = {Summary of the hydrogeology of the Valley and Ridge, Blue Ridge, and Piedmont physiographic provinces in the eastern United States},
	publisher = {U.S. Geological Survey},
	year = {2004.},
	series = {Regional aquifer-system analysis--Appalachian Valley and Piedmont},
	address = {Reston, Va.},
	note = {Shipping list no.: 2004-0272-P.}
}