Northen, Henry. <br/><br/>
Introductory plant science 
[by] Henry T. Northen. 
 - 3d ed. 
 - New York,  Ronald Press Co.  [1968] 
 - viii, 586 p.  illus.  26 cm. 
<br/><br/><label>LCCN: </label>68013473  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Botany.