@inbook{Rao1988,
author = {Rao, J.N.K.},
title= {Variance estimation in sample surveys},
year = {1988},
editor = {Balakrishnan, N.},
editor = {Rao, C.R.},
booktitle = {Handbook of Statistics},
address = {Amsterdam},
publisher = {Elsevier Science Publishers},
pages = {427--447},
}