Das Dipali <br/><br/>
Environmental Science A 
by Dipali Das 
 - 2nd ed. 
 - Guwahati  K.M. publishing  2012 
 - 218p. 
<br/><br/><label>ISBN: </label>81859161004 
<br/><br/><label>Dewey Class. No.: </label>333.7