@book{15630,
	author = {Cunningham, William P. and Cunningham, Mary Ann.},
	title = {Environmental science :},
	publisher = {McGraw-Hill,},
	year = {2004.},
	address = {Dubuque, IA :},
	edition = {8th ed.},
	note = {Includes index.},
	url = {http://www.loc.gov/catdir/toc/ecip0411/2003025301.html}
}