Gupta, S P <br/><br/>
Practical statistics 

 - 37th ed 
 - S Chand & Company Ltd., New Delhi  1996 
 - viii, 563 
<br/><br/><label>ISBN: </label>81-219-0624-5 
<br/><br/><label>Dewey Class. No.: </label>311 Gup