Enger, Eldon D. <br/><br/>
Environmental science :  a study of interrelationships / 
Eldon D. Enger, Bradley F. Smith 
 - 4th ed. 
 - Dubuque, Iowa :  W. C. Brown Co.,  1992 
 - 514 p. ;  28 cm. 
<br/><br/><label>ISBN: </label>0697139247 
<br/><br/><label>LCCN: </label>90-085520 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Ecology