Hard, John M. <br/><br/>
Biology / 
John M. Hard ; illustrated by David Pratt. 
 - England :  Hamlyn Paperbacks,  1975. 
 - 127 p. :  ill. ;  18 cm. 
<br/><br/> Includes index. 
<br/><br/>339  339 
<br/><br/><label>ISBN: </label>0 600 313 131 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Boilogy
<br/><br/><label>Dewey Class. No.: </label>574 / H216b