TY  - BOOK
AU  - Sarndal Carl-Erik
AU  -  Swensson Bengt
AU  -  Wretman Jan
TI  - Model assisted survey sampling
U1  - B2817, N2 
PY  - 1992///
CY  - New York    
PB  -  Springer-Verlag        
KW  - sampling
ER  -