Gupta , S.P. and Gupta , Archana <br/><br/>
Statistical Methods 

 - New Delhi  Sultan Chand and Sons  2009 
 - 1.1,17.1,A.17p. 
<br/><br/><label>ISBN: </label>978-81-8054-596-2 
<br/><br/><label>Dewey Class. No.: </label>519.5   Gup.P9