@book{12063,
	author = {Cunningham, William P. and Cunningham, Mary Ann.},
	title = {Principles of environmental science :},
	publisher = {McGraw-Hill,},
	year = {c2008.},
	address = {New York :},
	edition = {4th ed.},
	note = {Includes index.},
	url = {http://www.loc.gov/catdir/toc/ecip0616/2006020498.html}
}