Singh, Ayodhya  . <br/><br/>
Textbook of environmental chemistry /  
by Ayodhya Singh. 
 - New Delhi :   Campus Books International ,   2002 
 - 542p :  
<br/><br/><label>ISBN: </label>81-87815-85-X 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Chemistry
<br/><br/><label>Dewey Class. No.: </label>G:55(E)  / P2;3