Lipsey, Richard G. Principles of economics / Richard G. Lipsey and K. Alec Chrystal. - 9th ed. - Oxford : Oxford University Press, c1999 [Reprinted 2002]. - xvi, 640 pages : illustrations ; 25 cm. Includes bibliographical references and index. ISBN: 0195663489 Subjects--Topical Terms: Economics. Dewey Class. No.: 330 LIP