TY  - SER
AU  -  Agrawal, M. C.
TI  -  Statistical research report: a comparison of a certain two-phase ratio estimators 
U1  -  310 
PY  - 1981///-
CY  -  [Sweden]
PB  -  University of UMEA
KW  -  Statistics
KW  -  Periodicals
N1  -  Latest issue consultedL: No.11 (Nov.1981)
ER  -