Yapp, W.B.  <br/><br/>
Production, polution, protection  
W.B. Yapp 
 - London  Wykeham   1972 
 - xii,183p.:ill.;22cm. 
 - The Wykeham Science series; 19 .
<br/><br/><label>Dewey Class. No.: </label>574.5  / YAP