Ariyasinghe, K. <br/><br/>
Science Grade-06. 

 - 1st, Ed. 
 - Nugegode :  Sarasavi Publisher,  2007. 
 - iv,80 p. 
<br/><br/><label>ISBN: </label>978955573671 
<br/><br/><label>Dewey Class. No.: </label>500  / ARI