@book{2119,
	author = { Downie, Norville Morgan  &   Health R. W.   and  Vilaplana, J. P.   },
	title = {Métodos estadísticos aplicados./},
	publisher = {Harper & Row Latinoamericana;},
	year = {c1971.},
	address = {México: },
	edition = {Tercera}
}