Turk, Amos. <br/><br/>
Ecology, pollution, environment / 
Amos Turk, Jonathan Turk and Janet T. Wittes. 
 - Philadelphia :  Saunders ,  1972. 
 - ix, 217 p. :  ill. ;  23 cm. 
 - Saunders golden series. .
<br/><br/> Includes index. 
<br/><br/>Includes bibliographical references. 
<br/><br/><label>ISBN: </label>0721691388 (pbk.) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Pollution.<br/>Ecology.<br/>Population.