@book{26502,
	author = {Thorpe, Gary S.},
	title = {Barron's how to prepare for the AP environmental science advanced placement examination /},
	publisher = {Barron's,},
	year = {c2002.},
	address = {Hauppauge, N.Y. :},
	note = {Includes index.},
	url = {http://www.loc.gov/catdir/description/barrons041/2002066720.html}
}