@book{2002,
	author = {Bell, Peter Robert. and Hemsley, Alan R.},
	title = {Green plants :},
	publisher = {Cambridge University Press,},
	year = {2000.},
	address = {Cambridge, UK ;},
	edition = {2nd ed.},
	url = {http://www.loc.gov/catdir/description/cam0210/99047854.html}
}