@book{167799,
	author = {Wittgenstein, Ludwig, and Anscombe, G.E.M., },
	title = {Sobre la certeza /},
	publisher = {Gedisa, },
	year = {1988},
	series = {Coleccion Hombre y Sociedad, Serie Mediaciones,},
	address = {Barcelona :},
	edition = {2a ed.},
	note = {Publicacion bilingue }
}