Watt, E.F. Kenneth. <br/><br/>
Principles of environmental science / 
Kenneth E.F. Watt. 
 - New York :  McGraw-Hill Book Company,  c1973. 
 - xiv, 319 pages :  Illustrations ;  25 cm. 
<br/><br/> Includes bibliographical references. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Environmental science.