Economics 
Samuelson, Paul A. 
 - Fourteenth edition. 
 -  McGraw-Hill, Inc.  1992 
 - xlii, 784 pages. 
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<br/><br/><label>ISBN: </label>9-71085622-7 
<br/><br/><label>Dewey Class. No.: </label>330 Sa4e 1992