Gupta, S.P <br/><br/>
Elementary Statistical Methods / 
by S.P. Gupta 
 - New Delhi:  Sultan Chand and Sons,  2006 
 - p.30 
<br/><br/><label>ISBN: </label>8180543323 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Statistics<br/> Collections of general statistics
<br/><br/><label>Dewey Class. No.: </label>310  / GUP-E