@book{67141,
	author = {Briggs, D. and Walters, S. M.},
	title = {Plant variation and evolution /},
	publisher = {Cambridge University Press,},
	year = {c1997.},
	address = {New York :},
	edition = {3rd ed.},
	note = {Includes Indexes.},
	url = {http://www.loc.gov/catdir/description/cam028/96039293.html}
}