Economic Theory And Operations Analysis/ 
Baumol,William J. 
 - 4th.ed. 
 - New Delhi:  PHI Learning PVt.Ltd,  1977. 
 - 606 
<br/><br/><label>ISBN: </label>9788120301412 
<br/><br/><label>Dewey Class. No.: </label>330.01  / BAU/E