William G. Cochran. <br/><br/>
Sampling Techniques. 

 - New Delhi  Wiley Eastern private limited.  1972. 
 - xvii, 413p.  22cm. 
<br/><br/> Includes index. 
<br/><br/><label>ISBN: </label>0852261225 
<br/><br/><label>Dewey Class. No.: </label>519.5COC.