Billings, W. D. (William Dwight), 1910-  Billings, W. D. (William Dwight), 1910- <br/><br/>
Plants and the ecosystem. 

 - London :  Macmillan,  [1964] 
 - Fundamentals of botany series .
<br/><br/>Bibliography : p. 147-148. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Plant ecology.