Cunningham, William P. <br/><br/>
Environmental science :  global concern / 
William P. Cunningham, Barbara Woodworth Saigo. 
 - 6th edition. 
 - New York :  The McGraw- Hill Companies,  2001. 
 - 646 pages :  illustrations ;  28 cm. 
<br/><br/> Includes bibliographical references and index. 
<br/><br/><label>ISBN: </label>0072909323 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Environmental sciences.