@book{229920,
	author = {Hammer, Mark J. and Hammer, Mark J.},
	title = {Water and wastewater technology},
	publisher = {Pearson/Prentice Hall},
	year = {c2012.},
	address = {Upper Saddle River, N.J.},
	edition = {7th ed.},
	url = {http://www.loc.gov/catdir/toc/fy11pdf04/2010027782.html}
}