Hansen Morris H <br/><br/>
Sample survey methods and theory 
Hansen Morris H; Hurwitz William N; Madow William G 
 - p.  cm. 
<br/><br/><label>Standard No.: </label>20623 
<br/><br/><label>Source: </label> Textual 
<br/><br/><label>Dewey Class. No.: </label>B2817, J6.2