Kumar, Arvind . <br/><br/>
A Text Book Of Environmental Science /  Textual Documents 
Arvind Kumar. 
 - 2004 ed / 
 - N.Delhi :  APH Publishing Corpn. ,  2004. 
 - 376 ; 
<br/><br/><label>ISBN: </label>81-7648-590-x 
<br/><br/><label>Subjects--Index Terms: </label>Environment,Environmental Science 
<br/><br/><label>Dewey Class. No.: </label>620.8  / Ku 96 Te