Jayanthi <br/><br/>
Science & technology/by Jayanthi, A Sunita Purushothaman and Vimal Sardana 

 - New delhi  Bluebird books  2001 
 - 48p. 
<br/><br/><label>ISBN: </label>8175820462 
<br/><br/><label>Dewey Class. No.: </label>507  J334Sc