@book{55952,
	author = {Díaz Fernández, Valero.},
	title = {Los grandes problemas },
	editor = {Est. Tip. de Cleto Vallinas)},
	publisher = {[s.n.], },
	year = {1915 (},
	series = {Obras de Valero Díaz Fernández ; },
	address = {Madrid : }
}