@book{11318,
	author = {Duby, Georges and Torras Elías, Jaime},
	title = {Economía rural y vida campesina en el Occidente Medieval},
	publisher = {Ediciones Península},
	year = {1991},
	series = {Historia, ciencia, sociedad},
	address = {Madrid},
	edition = {3ª ed.},
	note = {Apéndice p. 540-546}
}