Barnal, J.D. <br/><br/>
Vigyan kee samajik bhumika 
by J.D. Barnal 
 - Delhi  Granth Shilpy  2000 
 - 606p. 
<br/><br/><label>ISBN: </label>81 86684 38 7 
<br/><br/><label>Dewey Class. No.: </label>YA B252