@article{MET_1966__10_175289,
     author = {J.T. Rao},
     title = {On the {Variance} of the {Ratio} {Estimator} for {Midzuno-Sen} {Sampling} {Scheme}},
     journal = {Metrika},
     pages = {89--91},
     publisher = {mathdoc},
     volume = {10},
     year = {1966},
     url = {http://geodesic.mathdoc.fr/item/MET_1966__10_175289/}
}