@book{21446,
	author = {Laubach, Frank  and Laubach, Robert S. },
	title = {How to make the world literate / },
	publisher = {[s.n.], },
	year = {[19--]},
	address = {[S.l.] : },
	note = {Cómo enseñar a los analfabetos}
}