@book{166397,
	author = {Woodward, D. G. and Gannett, Marshall W.},
	title = {Hydrogeologic framework of the Willamette Lowland Aquifer system, Oregon and Washington},
	publisher = {U.S. Geological Survey},
	year = {1998.},
	series = {U.S. Geological Survey professional paper},
	address = {Washington, DC}
}