Ray, Dipak Kumar . <br/><br/>
Tatthya vittik samaj o tatthya biggyan /  
Dipak Kumar Ray. 
 - Kolkata :   Gyan Publishing House ,   1990. 
 - 166p. :   ill.,maps ;   2cm  1 CD .  
<br/><br/>NULL 
<br/><br/><label>ISBN: </label> NULL (Pbk) 
<br/><br/><label>Subjects--Index Terms: </label>INFORMATION SCINCE 
<br/><br/><label>Dewey Class. No.: </label>020  / ROY/T