@book{4875,
	author = {Ruiz Vega, Jaime.},
	title = {Cómo cultivar maíz y frijol en surcos alternos en los Valles centrales de Oaxaca},
	publisher = {INIFAP. Campo Experimental Valles Centrales,},
	year = {1991},
	series = {Hoja desplegable para productores},
	address = {Etla, Oax. :},
	note = {55-6}
}