@book{98055,
	author = {Alferes Varela, Mario},
	title = {Ventajas competitivas del maíz en la República Méxicana},
	publisher = {El autor,},
	year = {2009},
	address = {Chapingo, Méx. :},
	url = {http://10.13.5.2/tesis/109712.pdf}
}