Lipsey, Richard G. Principles of economics / Richard G. Lipsey, K. Alec Chrystal. - 9th ed. - Oxford : Oxford University Press, 1999 - xvi, 640 p. : Col. ill. ; 25 cm. ISBN: 019877639x Subjects--Topical Terms: EconomicsEconomic systems Economic theories Dewey Class. No.: 330.1 / LIP