HORWOOD, Robert H. <br/><br/>
Inquiry into environmental pollution/ 
R. H. Horwood. 
 - Toronto,  Macmillan of Canada,  c1973. 
 - 116 p.:  ill.; 
<br/><br/> Include bibliographical references 
<br/><br/><label>ISBN: </label>0770509819 
<br/><br/><label>Dewey Class. No.: </label>301.31