TY  - GEN
AU  - Cochran, William G
TI  - Sampling techniques
SN  - 047116240X
U1  - 001.4222 
PY  - 2002///
CY  - New York
PB  - John Wiley
KW  - RESEARCH METHODS
KW  - SAMPLING
KW  - SAMPLING TECHNIQUES
KW  - STATISTICAL METHODS
ER  -