Abercrombie, M, Hickman, C J & Johnson, M L <br/><br/>
A dictionary of biology 

 - 5th ed 
 - Penguin Books Ltd., England  1966 
 - 284 
<br/><br/><label>ISBN: </label>0.14051.003.6 
<br/><br/><label>Dewey Class. No.: </label>R574.03 Abe