@book{19539,
	author = {Davis, Mackenzie Leo, and Masten, Susan J.},
	title = {Principles of environmental engineering and science /},
	publisher = {McGraw-Hill,},
	year = {c2004.},
	address = {New York, NY :},
	url = {http://www.loc.gov/catdir/enhancements/fy0614/2003046402-d.html}
}