Cohran, William G. <br/><br/>
Sampling techniques 

 - 3rd ed. 
 - New York  John Wiley  1999 - R 2007 
 - xvi,428p.  PB  22cm. 
<br/><br/><label>ISBN: </label>9788126515240 
<br/><br/><label>Dewey Class. No.: </label>519.52  / COC