Clapham, Wentworth B. <br/><br/>
Natural ecosystems / 
W. B. Clapham Jr. 
 - New York :  Macmillan,  1973. 
 - vii, 248 p. :  illus. ;  26 cm. 
<br/><br/>Includes bibliographies. 
<br/><br/> Open access. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Ecology.