Young, John,  <br/><br/>
Sustaining the earth 
John Young. 
 - Cambridge, Mass.  Harvard University Press  1990. 
 - 225 pages ;    25 cm. 
<br/><br/><label>ISBN: </label>0674858204 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Nature conservation--Political aspects<br/>Environmental protection--Political aspects