Enger, Eldon D. <br/><br/>
Environmental science :  a study of interrelationships / 
Eldon D. Enger and Bradley F. Smith. 
 - 13th ed. 
 - New York :  McGraw-Hill,  2013. 
 - xxv, 485 p. :  ill. (chiefly col.), col. maps ;  27 cm. 
<br/><br/> Includes index 
<br/><br/><label>ISBN: </label>9780071318150 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Environmental sciences--Textbooks.