Hansen, Morris. <br/><br/>
Sample survey methods and theory :  volume 1 methods and applications / 
by Morris Hansen. 
 - London :  John Wiley & Sons,  c1953. 
 - 638 p. 
<br/><br/>Includes bibliographical references and index. 
<br/><br/><label>LC Class. No.: </label>QA276.6  / .H33