Clapham, Wentworth B. <br/><br/>
Natural ecosystems / 
W.B. Clapham. 
 - 2nd ed. 
 - New York :  Macmillan,  c1983. 
 - ix, 282 p. :  ill. ;  26 cm. 
<br/><br/> Includes index. 
<br/><br/>Includes bibliographical references. 
<br/><br/><label>ISBN: </label>0023225203 (pbk.) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Ecology.