Kalpana Mitra <br/><br/>
Prakritik bhugol (jalbayubidya,mrittika bhu-bidya o jeebbhugol), vol-2 / 
Kalpana Mitra ; Jyotirmay Sen ; Purabi Sengupta 
 -  Kalyani Publishers 
<br/><br/><label>ISBN: </label>8127231061 
<br/><br/><label>Dewey Class. No.: </label>904.5