TY  - BOOK
AU  - Cassel, Claes Magnus.
TI  - Foundations of inference in survey sampling
T2  - Wiley series in probability and amtheamtical statistics
SN  - 0471025631
U1  - 519.52 
PY  - 1977///
CY  - New York
PB  - Wiley Interscience
ER  -