Environmental science / 
Amos Turk ... (et al.) 
 - 2nd ed 
 - Philadelphia :  W. B. Saunders,  1978 
 - 957p. :  ill.,  28 cm. 
 - Saunders golden sunburst series in environmental studies .
<br/><br/><label>ISBN: </label>0721689272 
<br/><br/><label>LCCN: </label>77-24005 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Ecology<br/>Pollution<br/>Environmental protection