G.C.E (Advanced Level ) Biology :  Grade - 13 Resource Book . 

 - 2nd Ed. 
 - Maharagama :  National Institute of Education,  2023. 
 - viii, 67 p. 
<br/><br/><label>ISBN: </label>9789556548938 
<br/><br/><label>Dewey Class. No.: </label>570  / BIO