Sugunthan, Yogenthiri. <br/><br/>
Science Grade -07 :   Part-01 

 - 1st, Ed. 
 - Colombo :  Lanka Book Depot, 
 - iv,186 p. 
<br/><br/><label>ISBN: </label>9789557051734 
<br/><br/><label>Dewey Class. No.: </label>500  / SUG