@inbook{Brass1968,
author = {Brass, W. and Coale, A.J.},
title= {Methods of analysis and estimation},
year = {1968},
editor = {Brass, W.},
editor = {Coale, A.J.},
editor = {Demeny, P.},
editor = {Heisel, D.F.},
editor = {Lorimer, F.},
editor = {Romaniuk, A.},
editor = {Van de Walle, E.},
booktitle = {The demography of tropical Africa},
address = {Princeton},
publisher = {Princeton University Press},
pages = {88--139},
}