@book{23149,
	author = {Wiersema, John Harry. and León, Blanca.},
	title = {World economic plants :},
	publisher = {CRC Press,},
	year = {c1999.},
	address = {Boca Raton, FL :},
	url = {http://www.loc.gov/catdir/enhancements/fy0744/98053515-d.html}
}