Chopra, P.N. . <br/><br/>
Principles of Economics /  Textual Documents 
P.N.Chopra. 
 - 5th Rev.ed. / 
 - New Delhi :  Kalyani Publisher ,  1988. 
 - viii,722p. ;  22cm. 
<br/><br/><label>Subjects--Index Terms: </label>Economics G-Economics 
<br/><br/><label>Dewey Class. No.: </label>330  / Ch 455 Pr