Rickson, Fred R. <br/><br/>
Plant diversity:  organisms/ 
Fred Rickson. 
 - New York:  McGraw-Hill,  1974. 
 - 22 pages:    illustration;   28 cm. 
 - Biocore  unit 15 .
<br/><br/><label>ISBN: </label>0070053464 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Botany--Variation.<br/>Plants--Evolution.<br/>Plants--Anatomy and histology.