Indaka, Karunadasa <br/><br/>
Environment ? Conservation ? or Pollution 

 -    1990 
 - 43p., ill.,  21 cm 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Water pollution <br/>Air pollution <br/>Environmental pollution <br/>Pollution
<br/><br/><label>Universal Decimal Class. No.: </label>577.4  / KAR