Samuelson,Paul A Willaim D. Nordhaus  <br/><br/>
Economics / 
by Paul A. Samuelson and William D . Nordhaus 
 - New Delhi:  Mc Graw Hill Education,  2013 
 - p.916 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Economics
<br/><br/><label>Dewey Class. No.: </label>330  / SAM-E