@book{90458,
	author = {Le Goff, Jacques. and Ortiz, Lourdes,},
	title = {La Baja Edad Media / },
	publisher = {Siglo XXI, },
	year = {[1974]},
	series = {Historia universal. Siglo XXI ; },
	address = {[Madrid] : },
	edition = {[4ª ed.].}
}