Samuelson, Paul A. 1915-2009. Economics/ Paul A. Samuelson & William D. Nordhaus. - 18th ed. - New York : McGraw-Hill, 2006. - xxiv, 776 p. illus. 25 cm. Includes bibliographical references & Index. Subjects--Topical Terms: Economics. LC Class. No.: HB171.5 / .S25 1973 Dewey Class. No.: 330