TY  - GEN
AU  - Williams,Bill
TI  - A sampler on sampling
T2  - Wiley series in probability and mathematical statistics
SN  - 0471030368
U1  - 519.5/2 
PY  - 1978///
CY  - New York
PB  - Wiley
KW  - Sampling (Statistics)
N1  - Cuprinde bibliografie si index
ER  -