Samuelson, Paul Anthony. Microeconomics / Paul A. Samuelson, William D. Nordhaus. - 18th ed. - New York : McGraw-Hill, 2005. - xxx, 439 p. ; 26 cm. ISBN: 0071112987 : Subjects--Topical Terms: Macroeconomics. LC Class. No.: HB172 / .S26 2005