@inbook{Brass1968, author = {Brass, W. and Coale, A.}, title= {Methods of analysis and estimation}, year = {1968}, editor = {Brass, W.}, editor = {Coale, A.}, editor = {Demeny, P.}, editor = {Heisel, D.}, editor = {Lorimer, F.}, editor = {Romaniuk, A.}, editor = {van deWalle, E.}, booktitle = {The demography of tropical africa}, address = {Princeton}, publisher = {Princeton University Press}, pages = {88--150}, }