TY  - BOOK
AU  - Dagsvik John
TI  - Post-stratification and estimation within subpopulations
U1  - 000SB:304.6 
PY  - 1974///
CY  - Oslo
PB  - Norway. C B S
KW  - Estimation theory
KW  - Population
KW  - Sampling (Statistics)
ER  -