Roy, Dipakkumar  .  <br/><br/>
Uttari Bharat May Samajik Arthik Pariwartan ( Es Pur 600 to 200 Es Pur) /  Dipakkumar Roy. 

 - New Delhi   Kunal  2009 
 - 1343p. 
<br/><br/><label>Dewey Class. No.: </label>891.43  / ROY