Cochran, William G. <br/><br/>
Sampling Techniques  
/ by William G. Cochran 
 - 3rd ed. 
 -  John Wiley & Sons, Inc.:  1977. 
 - xvi, 428p. 
<br/><br/><label>ISBN: </label>047116240X 
<br/><br/><label>Dewey Class. No.: </label>519.52  / COC/S