Kumar , Ram <br/><br/>
Encyclopedia of environmental science and technology / 
by Ram Kumar 
 - New Delhi :   Sarup & Sons Publication ;  2001. 
 - 3 Vol. :  ill. ;  32cm. 
<br/><br/><label>ISBN: </label>8178900289(set) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Encyclopaedia<br/>Environmental pollution<br/>Air pollution<br/>Water pollution
<br/><br/><label>Dewey Class. No.: </label>R 333.703  / RAM P01E