@book{23047,
	author = {Sivarajan, V. V. and Robson, N. K. P.},
	title = {Introduction to the principles of plant taxonomy /},
	publisher = {Cambridge University Press,},
	year = {c1991.},
	address = {Cambridge :},
	edition = {2nd ed.},
	note = {Includes bibliography and index.},
	url = {http://www.loc.gov/catdir/description/cam024/89034314.html}
}