Gupta ,  S. P. & Gupta M.P. <br/><br/>
Business Statistics 

 - New Delhi  Sultan Chand & Sons  2009 
 - 1.1-19.27p. 
<br/><br/><label>ISBN: </label>81-7014-876-6 
<br/><br/><label>Dewey Class. No.: </label>519.5   Gup.P9