@book{27528,
	author = {Cady, Richard Carlysle, and Geological Survey (U.S.)},
	title = {Ground-water resources of northern Virginia,},
	year = {1938.},
	series = {Virginia. Geological Survey. Bulletin 50},
	address = {University, Va.,},
	note = {At head of title: Commonwealth of Virginia. State Commission on Conservation and Development. Virginia Geological Survey.}
}