Smith, Gilbert M, et al. <br/><br/>
Textbook of general botany 

 - 5 
 -  Macmillan Company, New York  1953 
 - 606 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Botany
<br/><br/><label>Dewey Class. No.: </label>581  SMI-T5