Environmental science :  a study of interrelationships / 
Eldon D. Enger, Bradley F. Smith. 
 - 11th  ed. 
 - Boston :  McGraw Hill,  2008. 
 - xxiv, 488  p. 
<br/><br/><label>ISBN: </label>0073050287 : 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Environmental sciences.