@book{105874,
	author = {Pirenne, Henri},
	title = {Las cíudades de la Edad Media},
	publisher = {Alianza},
	year = {1975, c1972.},
	series = {Sección : Humanidades},
	address = {Madrid},
	edition = {2a. ed.},
	note = {Translation of: Les villes du Moyen Age.}
}