Welch, Patrick J. Economics, theory & practice / Economics, theory and practice Patrick J. Welch, Gerry F. Welch. - 9th ed. - Hoboken, N.J : John Wiley, c2010. - xx, 536 p. : col. ill. ; 26 cm. Includes bibliographical references and index. ISBN: 9780470450093 (pbk.) 0470450096 (pbk.) LCCN: 2011420558 Subjects--Topical Terms: Economics. LC Class. No.: HB171.5 / .W3935 2010 Dewey Class. No.: 330 / WPE