Rao, J. N. K. and Others <br/><br/>
Variance estimation with one unit per stratum   
By J. N. K. Rao, H. O. Hartley and Grace Kiefer 
 - Calcutta  ISI  1969 
 - 25p. 
<br/><br/>  
<br/><br/><label>Dewey Class. No.: </label>SA.6  / R215