Ahmad, Sultan, 1937- Approaches to purchasing power parity and real product comparisons using shortcuts and reduced information / Prepared by Sultan Ahmad. - Washington, D.C. : World Bank, 1980. - ii, 60 leaves ; 28 cm. - World Bank staff working paper ; no. 418 . Cover title. "September 1980." Bibliography: leaves 58-60. LCCN: 82215742 Subjects--Topical Terms: Gross national productGayri safi milli hasıla LC Class. No.: HC79.I5 / A35 1980 Dewey Class. No.: 339.3 / AHM 1980