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

 - 2 ed. 
 - Philadelphia, Lea & Febiger,  1931 
 - 338 p.  : ilus 
<br/><br/><label>LCCN: </label>27997 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Ecología vegetal.
<br/><br/><label>Dewey Class. No.: </label>581.5  / M23