Okumu, Gladys B. et al. <br/><br/>
Secondary Biology /  Form four students Book 

 - 5th ed. 
 - Nairobi :  Kenya Literature Bereau,  1989 
 - xii, ill. col. 148 p.  18 cm 
<br/><br/><label>ISBN: </label>9789966651686 
<br/><br/><label>Dewey Class. No.: </label>500.570