Enger, Eldon D. <br/><br/>
Environmental science :  a study of interrelationships / 
Eldon D. Enger, Bradley F. Smith 
 - 7th ed. 
 - Boston :  McGraw Hill,  2000 
 - xxi, 434 p. :  ill. ;  27 cm. 
<br/><br/><label>ISBN: </label>0072304952 
<br/><br/><label>LCCN: </label>99-021073 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Environmental sciences