Subramanian,V. <br/><br/>
A Textbook In Environmental Science 
V.Subramanian 
 - New Delhi  Narosa Publishing House  2005 
 - 238p. 
<br/><br/> P.B 
<br/><br/><label>ISBN: </label>8173194106 
<br/><br/><label>Dewey Class. No.: </label>363.7 SUB