Occasional monograph 

 - New Delhi  India Institute of Ecology and Environment(IIEE)  1994 
 - 14p. 
<br/><br/><label>ISBN: </label> RS 30.00 
<br/><br/><label>Source: </label> RS 30.00 
<br/><br/><label>Dewey Class. No.: </label>304.2 OCC