@book{14504,
	author = {Langhammer, Rolf J. and Sapir, André.},
	title = {Economic impact of generalized tariff preferences /},
	publisher = {Gower Pub. Co.,},
	year = {1987.},
	address = {Aldershot, Hants, England ;},
	note = {"For the Trade Policy Research Centre."}
}