Kraay, Art When is external debt sustainable? / Art Kraay & Vikram Nehru - Washington D.C. : The World Bank (WB) , 2004 - 49p. : ill. ; 25 cm. - Policy Research Working Paper No. 3200 . Subjects--Topical Terms: Debt distressCredit policiesExternal debt Gov. Doc. Class. No.: UN WB PRWP-3200