Demirguc-Kunt, Asli The Role of Officially Supported Export Credits in Sub-Saharan Africa's External Financing by Asli Demirguc-Kunt and Refik Erzan - Washington, D.C. IBRD 1991 - 40p. - Working Papers WPS 603 . Subjects--Topical Terms: Exports --Africa, Sub-Saharan --FinanceExport credit --Africa, Sub-Saharan