Jones, David A. <br/><br/>
Variation and adaptation in plant species / 
David A. Jones and Dennis A. Wilkins. 
 - London :  Heinemann Educational Books,  1971. 
 - vii, 184 p., plate. : 
<br/><br/><label>ISBN: </label>0435614800 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Plants
<br/><br/><label>Dewey Class. No.: </label>581.35  / Va