Yogenthiri, S. <br/><br/>
Grade - 07 SCIENCE Part 2. 

 - 1st Ed. 
 - Colombo :   Lanka Book Depot (PVT) Ltd,  
 - v, 157 p. 
<br/><br/><label>ISBN: </label>9789557888798 
<br/><br/><label>Dewey Class. No.: </label>500  / YOG