TY  - BOOK
AU  - Hansen M H
AU  - Hurwitz W N
AU  - Madow W G
TI  - Sample survey methods and theory
U1  - 000SA.08 
PY  - 1993///
CY  - N Y
PB  - John Wiley
KW  - Sampling methods
N1  - V1 : Methods and applications
ER  -