@book{15433,
	author = {Enger, Eldon D. and Smith, Bradley F.},
	title = {Environmental science :},
	publisher = {McGraw-Hill,},
	year = {℗♭2006.},
	address = {Boston :},
	edition = {10th ed. /},
	note = {Includes index.},
	url = {http://catdir.loc.gov/catdir/toc/ecip0422/2004019843.html}
}