@book{6575,
	author = {Laredo Villa, Alejandro.},
	title = {Control químico de la maleza en caña de azúcar (Saccharum officinale L) en Ursulo Galván, Ver., México},
	publisher = {El autor,},
	year = {1992},
	address = {Chapingo, Méx. :},
	note = {62-218}
}