Yapp, W . B  <br/><br/>
Production, pollution , protection 

 - London  Wykeham publications  1972 
 - xii , 183p. 
<br/><br/><label>ISBN: </label>0851092500 0851093000 
<br/><br/><label>Subjects--Index Terms: </label>Pollution  
<br/><br/><label>Dewey Class. No.: </label>628.5  / YAP