TY  - BOOK
AU  - Chaudhuri A
AU  -  Vos J W E
TI  - Unified theory and strategies of survey sampling
T2  - North Holland Series in Statistics and Probability; 4
U1  - B2817, M8 
PY  - 1988///
CY  - Amsterdam
PB  - North Holland        
KW  - sampling
ER  -