Northen, Henry T. <br/><br/>
Introductory plant science / 
 Plant science 
Henry T. Northen. 
 - 2nd ed. 
 - New York :  Ronald Press Co.,  1958. 
 - xii,718p.  ill. 
<br/><br/>Includes bibliogr. references and index 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Botany