The World Bank Policy and Research Bulletin / Research Advisory S taff. - Washington, D.C. : Research Advisory Staff, 1990- - v. ; 28 cm. - Quarterly - Vol. 2 no. 4 (Aug./Oct. 1991)- Subjects--Corporate Names: World Bank--Periodicals. Subjects--Topical Terms: Economic assistance--Developing countries--Periodicals.Technical assistance--Developing countries--Periodicals.