An introduction to positive economics / 
Lipsey, Richard G. and Chrystal, K. Alec 
 - 8th edition. 
 - Oxford :  Oxford University Press.,  c1995 
 - xxiv,919 pages :  ill.som.col.;  26cm.  Includes bibliographic 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