GUPTA, S.P. <br/><br/>
ELEMENTARY STATISTICAL METHODS 

 - 13rd Ed. 
 - New Delhi  Sultan Chand and Sons, New Delhi   2003 
<br/><br/><label>ISBN: </label>81 7014 402 7 
<br/><br/><label>Dewey Class. No.: </label>519.5  / GUP/E