Clarke, George L. <br/><br/>
Elements of ecology / 
George L. Clarke 
 - New York :  Wiley,  c1954 [ Printing 1967]. 
 - xiv, 534 p. :  ill. ;  23 cm. 
<br/><br/>Includes bibliography and index. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Plant Ecology.
<br/><br/><label>Dewey Class. No.: </label>581.7  / CLE 1963