Sugunthan, Yogenthiri. <br/><br/>
Science Grade - 9 Part I. 

 - 1st Ed. 
 - Colombo :   Lanka Book Depot (PVT) Ltd,  
 - iv, 212 p. 
<br/><br/><label>ISBN: </label>9789557051970 
<br/><br/><label>Dewey Class. No.: </label>500  / SUG