@inbook{Judson1975,
author = {Judson, D.H.  and Popoff, C.L. },
title= {Selected General Methods},
year = {1975},
editor = {Swanson, D.},
editor = {Siegel, J.S.},
booktitle = {The Methods and Material of Demography},
address = {San Diego, CA},
publisher = {Academic Press},
pages = {677--732},
}