Eluwa, M. C. et al. <br/><br/>
Countdown to WASSCE/SSCE, NECO, JME Biology 

 - Third Edition 
 - Nigeria  Evans Brothers (Nigeria Publishers) Ltd  2004 
 -  275 
<br/><br/><label>ISBN: </label>978-020-223-4 
<br/><br/><label>Dewey Class. No.: </label>570 .7 ELU  / 20800