@book{68802,
	author = {Ramírez Rojas, Sergio Gavino.},
	title = {Control de la maleza en el cultivo de sorgo (Sorghum bicolor L. Moech) en la región de Texcoco, Méx.},
	publisher = {El autor,},
	year = {1987},
	address = {Chapingo, Méx. :},
	note = {31-199}
}