Turk, Jonathan. <br/><br/>
Introduction to environmental studies / 
Jonathan Turk. 
 - 3rd ed. 
 - Philadelphia :  Sounders College Pub.  1989. 
 - 392 p. :  ill. ;  26 cm. 
<br/><br/><label>ISBN: </label>1039236991 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Ecology<br/>Pollution--Environmental aspects.