@book{30245,
	author = {Davis, Mackenzie Leo, and Cornwell, David A.,},
	title = {Introduction to environmental engineering /},
	publisher = {WCB McGraw-Hill,},
	year = {c1998.},
	series = {McGraw-Hill series in water resources and environmental engineering},
	address = {Boston, Mass. :},
	edition = {3rd ed.}
}