Sugunthan, Y. <br/><br/>
Grade - 07 Science. 

 - 1st Ed. 
 - Colombo :   Lanka Book Depot,   2017. 
 - 186 p. 
<br/><br/><label>ISBN: </label>9789557888330 
<br/><br/><label>Dewey Class. No.: </label>500  / SUG