Samuelson, Paul A.. <br/><br/>
Readings in Economics /  

 - Seventh Ed. /  
 - New Delhi :   Tata McGraw-Hill Publishing Company Ltd.. 
 - p384 :  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Economics 
<br/><br/><label>Dewey Class. No.: </label>X  / J5S,L3