Hanson, Herbert C. <br/><br/>
The plant community/ 
Herbert C. Hanson and Ethan D. Churchill. 
 - New York:  Reinhold Publishing Corporation,  1961. 
 - 218 p. :   ill. ;   23 cm. 
<br/><br/> Includes index. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Plant communities.