@book{103308,
	author = {Duby, Georges and Torras Elías, Jaime},
	title = {Economía rural y vida campesina en el occidente medieval},
	publisher = {Ediciones Península,},
	year = {1973},
	series = {Historia, ciencia, sociedad ;},
	address = {Barcelona, España :},
	edition = {2a. ed.}
}