Rao, K. Sudha <br/><br/>
Open learning system 
K. Sudha Rao 
 - New Delhi  Lancer International  1989 
 - xv, 148 
<br/><br/><label>ISBN: </label>8170620627  180.00 
<br/><br/><label>Dewey Class. No.: </label>378.03 R180O