@book{166784,
	author = {Unamuno, Miguel de,},
	title = {Tres ensayos : },
	editor = {Imp. de A. Marzo)},
	publisher = {B. Rodríguez Serra, },
	year = {1900 (},
	address = {Madrid : },
	url = {http://bdh-rd.bne.es/viewer.vm?id=0000201027&page=1 }
}