GUPTA, C.B. <br/><br/>
INTRODUCTION TO STATISTICAL METHODS 

 - 7th Ed. 
 - Delhi  Vikas Publishing House Pvt. Ltd., Delhi   1977 
<br/><br/><label>ISBN: </label>0 7069 0459 1 
<br/><br/><label>Dewey Class. No.: </label>519.5  / GUP/IN