Gregory, Paul R. Comparing economic systems in the twenty-first century / Paul R. Gregory, Robert C. Stuart. - 7th ed. - Boston : Houghton Mifflin, c2004. - xviii, 558 p. : ill ; 24 cm. Earlier editions published under the title Comparative economic systems. ISBN: 0618261818 LCCN: 2004301486 Subjects--Topical Terms: Comparative economics. Dewey Class. No.: 330.1