TY  - BOOK
AU  - Cassel Claes-Marnus
AU  - Sarndel Carl-Erik
AU  - Wretman J H
TI  - Foundations of inference in survey sampling
U1  - 000SA.08 
PY  - 1977///
CY  - London
PB  - John Wiley
KW  - Sampling
ER  -