@book{3483,
	author = {Wittgenstein, Ludwig, and Hanfling, Oswald,},
	title = {De la certesa /},
	publisher = {Edicions 62,},
	year = {1983},
	series = {Clàssics del pensament modern ;},
	address = {Barcelona :},
	note = {Tit. orig.: Ueber Gewiβheit}
}