TY  - JOUR
AU  - A. Chaudhuri
AU  - A.K. Adhikary
TI  - On Efficiency of the Ratio Estimator.
JO  - Metrika
PY  - 1989
SP  - 55
EP  - 59
VL  - 36
IS  - 3-4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/MET_1989__36_3-4_176214/
ID  - MET_1989__36_3-4_176214
ER  -