Nagar, A. L  & Das, R. K <br/><br/>
Basic statistics 

 - 2nd ed 
 - OUP, New Delhi  1976 
 - x,424 
<br/><br/><label>ISBN: </label>0-19-561554-9 
<br/><br/><label>Dewey Class. No.: </label>311 Nag/Das