Cochran, William G. (William Gemmell), 1909-1980  <br/><br/>
Sampling techniques 

 - 3rd ed. 
 - Jhon Wiley & Sons  New York  1977 
 - xvi,428+p  pc  22cm 
<br/><br/><label>ISBN: </label>0471029394 
<br/><br/><label>Dewey Class. No.: </label>001.4'222 COC 1977