Understanding economics / Russell S. Sobel ... [et al.]. - Mason, Ohio : Thomson South-Western, 2006. - 656 p. : ill. ; 28 cm. Includes bibliographical references. ISBN: 9780324315639 Subjects--Topical Terms: Economics. LC Class. No.: HB171 / .U63 2006 Dewey Class. No.: 330 / UNE