Watt, Kenneth. <br/><br/>
Understanding the Environment. 

 - Massachusetts,:  Allyn and Bacon,  c1982 
 - xv, 431p.  :  ill.;  24cm. 
<br/><br/> Includes index. 
<br/><br/>Includes bibliographical references. 
<br/><br/><label>ISBN: </label>0205072658 (hbk.) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Human ecology.<br/>Environmental policy.