@book{330207,
	author = {Horan, N. J.},
	title = {Biological wastewater treatment systems :},
	publisher = {Wiley,},
	year = {c1990.},
	address = {Chichester ;},
	note = {P.B},
	url = {http://www.loc.gov/catdir/toc/onix03/89016629.html}
}