Enger, Eldon D. <br/><br/>
Environmental science :  a study of interrelationships. 
Eldon D. Enger and Bradley F. Smith 
 - 9th ed. 
 - New York:  McGraw-Hill,  2004. 
 - xvii, 477 p.  ill. 
<br/><br/>Includes index. 
<br/><br/>
<br/><br/><label>ISBN: </label>0071242805 
<br/><br/><label>Dewey Class. No.: </label>SS 363.7  / E54 2007 c.1