@book{9332,
	author = {Edzwald, James K. and Haarhoff, Johannes. and American Water Works Association.},
	title = {Dissolved air flotation for water clarification /},
	publisher = {American Water Works Association ;},
	year = {c2012.},
	address = {Denver, CO :},
	url = {http://www.loc.gov/catdir/enhancements/fy1210/2012392434-b.html}
}