TY  - BOOK
AU  - Cassel,Claes-Magnus
TI  - Foundations of inference in survey sampling 
T2  - Wiley series in probability and mathematical statistics
U1  - 519.2 
PY  - 1977///
CY  - New York
PB  - John Wiley & Sons
KW  - survey sampling
KW  - inference
KW  - statistics
ER  -