Principles of economics 
Case, Karl E. 
 - Fourth edition. 
 -  Prentice Hall, Inc.  1996 
 - xxxi, 1014 pages. 
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<br/><br/><label>ISBN: </label>0-13-242017-1 
<br/><br/><label>Dewey Class. No.: </label>330C26p 1996