International comparisons of real product and purchasing power /
Kravis, Irving B.
Heston, Alan W.
Summers, Robert.
World Bank.
United Nations International Comparison Project.
Baltimore : Published for the World Bank [by] the Johns Hopkins University Press,
c1978.
At head of title: United Nations International Comparison Project, phase II
Includes bibliographical references and index
Income.
Gross national product.
Purchasing power.