ABERCROMBIE, M. HICKMAN, C.J. JOHNSON, M.L. <br/><br/>
PENGUIN DICTIONARY OF BIOLOGY 

 - 7th Ed. 
 - London  Penguin Books, London   1980 
<br/><br/><label>ISBN: </label>0 14 0711 06 
<br/><br/><label>Dewey Class. No.: </label>570.3  / ABE/P