Katyal, Timmy. <br/><br/>
Environmental pollution 

 - New Delhi:  Anmol Publications,  1989. 
 - 300 p. 
<br/><br/><label>ISBN: </label>8170411238 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Pollution, Environmental
<br/><br/><label>Dewey Class. No.: </label>546 KAT/ENV