000 00387nam a22001217a 4500
005 20220519114549.0
008 110224t xxu||||| |||| 00| 0 eng d
100 _aUsha, M.S.
_93236
245 _aSampling schemes providing unbiased ratio and regression estimators
260 _aThiruvananthapuram
_bDept of statistics, University of Kerala
_c1993
653 _aMSc Project
942 _2ddc
_cBK
999 _c274305
_d274305