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

 - 3rd ed. 
 - Chennai  Wiley Eastern  1977 
 - xvi, 428p, 22 cm. PB 
<br/><br/><label>ISBN: </label>0852261217 
<br/><br/><label>Dewey Class. No.: </label>519.52  / COC