Billings, W. D.  1910- <br/><br/>
Plants, man, and the ecosystem / 
W. D. Billings. 
 - 2nd ed. 
 - Belmont, Calif. :  Wadsworth Pub. Co. ,  1972 
 - x, 160 p. :  illus. ;  23 cm. 
 - Fundamentals of botany series .
 - Fundamentals of botany series .
<br/><br/> First and 3d ed. published under title: Plants and the ecosystem. 
<br/><br/>Includes bibliography( p. 149-151) and index. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Plant ecology.
<br/><br/><label>Dewey Class. No.: </label>581.7  / BIP 1972