TY  - BOOK
AU  - Rao, J. N. K. and Others
AU  - Hartley, H. O. ; jt. auth.
AU  - Kiefer, Grace ; jt. auth.
TI  - Variance estimation with one unit per stratum
U1  - SA.6 
PY  - 1969///
CY  - Calcutta
PB  - ISI
ER  -