@book{44650,
	author = {Postan, M. M.},
	title = {The medieval economy and society :},
	publisher = {Penguin Books,},
	year = {1972 [reprinted 1993].},
	series = {Penguin economic history of Britain ;},
	address = {London :},
	note = {Originally published: London : Weidenfeld and Nicolson, 1972.}
}