Turk, Jonathan. <br/><br/>
Introduction to environmental studies / 
Jonathan Turk. 
 - 3rd ed. 
 - Philadelphia :  Saunders college,  1989. 
 - 392 p. 
<br/><br/> Includes index. 
<br/><br/><label>ISBN: </label>0030236991 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Conservation and natural resources--Study and teaching.
<br/><br/><label>LC Class. No.: </label>QH 541  / .T87