Sugunthan, Yogenthiri. <br/><br/>
Grade - 11 SCIENCE - Part 1. 

 - 1st Ed. 
 - Colombo :  Lanka Book Depot (PVT) Ltd, 
 - vo-1(258 p.) 
<br/><br/><label>ISBN: </label>9789557051628 
<br/><br/><label>Dewey Class. No.: </label>500  / SUG