Cashin, Paul Booms and slumps in world commodity prices / Paul Cashin, C. John McDermott - Washington : International Monetary Fund (IMF) , 1999 - 25p : ILL. ; 30 cm. - IMF Working Paper No. WP-99/155 . Includes bibliographical references . Subjects--Topical Terms: Commodity pricesSlumps Gov. Doc. Class. No.: UN IMF WP-99-155