Amjadi, Azita. Did external barriers cause the marginalization of Sub-Saharan Africa in World trade / U. Reincke; A. J. Yeats. - Washington,D.C : World Bank, 1996. - ix, 152 p. ; 28 cm. - World Bank discussion papers ; 348 . Includes bibliographical references. Open access. ISBN: 0821338269 LCCN: 9646465 Subjects--Topical Terms: Africa, Sub-Saharan.--Commerce.Exports--Africa, Sub-Saharan.