R.S.N.   PILLAI  BAGAVATHI <br/><br/>
STATISTICS THEORY AND PRACTICE 

 - NEW DELHI  S.CHAND & COMPANY LTD  1984 
<br/><br/><label>ISBN: </label>81-219-0431-5 
<br/><br/><label>Dewey Class. No.: </label>315  / PIL/S