William P. Cunningham. <br/><br/>
Principles of environmental science :  inquiry and applications / 
Cunningham, William P. 
 - 3rd ed. 
 - xviii, 428 p :  ill. (col.) ;  27 cm. 
<br/><br/> Includes index. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Environmental sciences - Textbooks.