@book{2783,
	author = {Keller, Edward A. and Botkin, Daniel B.},
	title = {Essential environmental science /},
	publisher = {John Wiley,},
	year = {c2008.},
	address = {Hoboken, NJ :},
	url = {http://www.loc.gov/catdir/enhancements/fy0740/2007033352-d.html}
}