@book{30215,
	author = {Watts, Simon,},
	title = {Essential environmental science :},
	publisher = {Routledge,},
	year = {1996.},
	address = {London ;},
	note = {Includes index.},
	url = {http://www.loc.gov/catdir/enhancements/fy0649/96015719-d.html}
}