TY  - BOOK
TI  - _Sampling Techniques (3rd ed. ) / Cochran William G. 
SN  - 47116240
AV  - QA 276.6 .C6 2011  
CY  - New York : John Wiley & Sons, 1977 
KW  - _Sampling statistics
N1  - Includes index
ER  -