Samuelson, Paul A. Economics / Paul A. Samuelson and William D. Nordhaus. - 13th ed. - New York : McGraw-Hill, c1989. - xl, 1013 p. : ill. (some col.) ; 25 cm. Includes index. ISBN: 0070547866 Subjects--Topical Terms: Economics. LC Class. No.: HB171.5 / .S26 1989