@book{192309,
	author = {Hamilton, Pixie A. and Miller, Timothy L. and Geological Survey (U.S.)  },
	title = {Water quality in the nation's streams and aquifers},
	publisher = {U.S. Dept. of the Interior, U.S. Geological Survey},
	year = {2004.},
	series = {Circular},
	address = {Reston, VA},
	url = {http://purl.access.gpo.gov/GPO/LPS50152}
}