Vishnudev Singh <br/><br/>
Jnanvardhak rochak ganith vijnan / 
Vishnudev Singh 
 - Delhi :  Archana Publications,  2011. 
<br/><br/><br/>In Hindi 
<br/><br/><label>ISBN: </label>9788189242121 
<br/><br/><label>Subjects--Index Terms: </label>Mathematics