Katyal, Timmy. <br/><br/>
Environmental pollution /  
Timmy Katyal, M. Sataka, Raj Kumar. 
 - New Delhi :   Anmol Publications ,   1989(rep1996). 
 - 302p :   ills,tables ;   22cm .  
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<br/><br/><label>ISBN: </label>8170411238  Rs 250.00 
<br/><br/><label>Subjects--Index Terms: </label>ENVIRONMENTAL-POLLUTION 
<br/><br/><label>Dewey Class. No.: </label>363.73  / KAT/E