@book{56973,
	author = {Díez, José Luis.},
	title = {Manual de sistemas y errores sociales / },
	editor = {Imp. Cerón)},
	publisher = {[s.n.], },
	year = {[ca.1943] (},
	series = {Biblioteca fomento social. Delegación en Andalucía ; },
	address = {Cádiz : },
	edition = {3ª ed.}
}