@book{447,
	author = {Levetin, Estelle. and McMahon, Karen.},
	title = {Plants and society /},
	publisher = {McGraw-Hill Higher Education,},
	year = {c2008.},
	address = {Boston :},
	edition = {5th ed.},
	url = {http://www.loc.gov/catdir/toc/ecip0722/2007028543.html}
}