Kumar, Arvind <br/><br/>
A textbook of environmental science 
/ by Arvind Kumar 
 - New Delhi:  A P H Publishing Corporation,  2004. 
 - 376p. 
<br/><br/><label>ISBN: </label>8176485896 
<br/><br/><label>Dewey Class. No.: </label>574.5  / KUM/A