Cunningham, William P. <br/><br/>
Principles of environmental science :  Inquiry and applications / 
By William P Cunningham, Mary Ann Cunningham. 
 - 4th ed. 
 - New Delhi :  McGraw Hill Education (India) Private Limited,  2007. 
 - 355p. ;  00 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>social problem and services.
<br/><br/><label>Dewey Class. No.: </label>363.7  / CUN