@book{6450,
	author = {Ortiz Barreto, Luzma.},
	title = {Rentabilidad financiera del sorgo (Sorghum vulgare var. Bicolor) en el ejido de Amayuca, municipio de Jantetelco, Mor. ciclo 1990},
	publisher = {El autor,},
	year = {1992},
	address = {Chapingo, Méx. :},
	note = {62-91}
}