TY  - BOOK
AU  - Cochran, William G.
TI  - Sampling techniques
SN  - 9788126515240
U1  - 519.52 
PY  - 2013///
CY  - New York: 
PB  - John Wiley & Sons Inc., 
KW  - Notation
KW  - Random sampling
KW  - Ratio estimation
KW  - Statistics
ER  -