Problem solving. 

 - 2nd ed. 
 - New Delhi :  Viva Books Pvt. Ltd.,  2007. 
 - 138 p.  ill.  22 cm. 
<br/><br/>Includes bibliographical references and index. 
<br/><br/><label>ISBN: </label>8130903547 
<br/><br/><label>Dewey Class. No.: </label>158.1