Kraay, Aart. When is external debt sustainable? / Aart Kraay and Vikram Nehru. - Washington, D. C : World Bank, 2004. - 49p ; 27 cm. - Policy research working papers ; no. 3200 . Mode of access: World Wide Web. "January 28, 2004" Includes bibliographical references. Closed access. Subjects--Topical Terms: Debts, External--Developing Countries.