@book{33,
	title = {Seguridad alimentaria},
	publisher = {FAO},
	year = {1996. },
	address = {Roma},
	note = {Tâitol de la versiâo en angl?es: Food security : some macroeconomic dimensions. },
	url = {http://www.fao.org/docrep/003/w1358e/w1358e00.htm}
}