Ruffin, Roy, 1938- Principles of macroeconomics / Roy J. Ruffin, Paul R. Gregory. - 6th ed. - Reading, Mass. : Addison-Wesley, c1997 - 1 v. (various pagings) : ill. (some col.) ; 26 cm. - The Addison-Wesley series in economics . Includes bibliographical references and indexes. ISBN: 0673994910 (alk. paper) Subjects--Topical Terms: Macroeconomics. Subjects--Index Terms: Kinh tế học Kinh tế vĩ mô Dewey Class. No.: 339