An introduction to postive economics / 
Lipsey,Richard and Chrystal,K Alec 
 - 8th ed. 
 - Oxford  :  Oxford university press ,  c1995 
 - xxiv,919p. :  ill.som.col.:  28cm.  It includes bibliographical references and indexes 
<br/><br/><label>ISBN: </label>0 19 442454 5 
<br/><br/><label>Subjects--Personal Names: </label>--Economics
<br/><br/><label>Dewey Class. No.: </label>330 LIP