McDougall, W. B. <br/><br/>
Plant ecology 

 - 3 ed. 
 - Philadelphia :  Lea & Febiger,  1941 
 - 285 p.  : ilus 
<br/><br/><label>LCCN: </label>27998 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Ecología vegetal.
<br/><br/><label>Dewey Class. No.: </label>581.5  / M23 1941