Eckholm, Erik P. <br/><br/>
Losing ground :  environmental stress and world food prospects / 
by Erik P. Eckholm. 
 - New York :  Norton,  1976. 
 - 223 p. ;  22 cm. 
<br/><br/> Includes index. 
<br/><br/>Bibliography : p. 203-219. 
<br/><br/><label>ISBN: </label>0393064107 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Man--influence on nature.<br/>Food supply.<br/>Soil erosion.<br/>Agricultural ecology.