Briggs,D. <br/><br/>
Plant variation and evolution/ 
D. Briggs, S.M. Walters. 
 - 3rd ed. 
 - New York :  Cambridge University Press,  1997. 
 - xxi, 417 p. :  ill., maps ;  24 cm. 
<br/><br/>Includes bibliographical refrences (p. 438-497) and index. 
<br/><br/><label>ISBN: </label>0521452953 (hb) 0521459184 (pbk.) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Leaves--Variation.<br/>Leaves--Evolution.
<br/><br/><label>LC Class. No.: </label>QK983  / B75 1997