Raven, Peter H. <br/><br/>
Biology of plants / 
Peter H. Raven, Ray F. Evert and Helena Curtis. 
 - 3rd ed. 
 - New York :  Worth ,  1981. 
 - xvi, 686 p. :  ill. (some col.) ;  29 cm. 
<br/><br/> Includes index. 
<br/><br/>Includes bibliographical references. 
<br/><br/><label>ISBN: </label>0879011327 (hbk. ) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Botany.