@inbook{Wolf1994,
author = {Wolf, D.A.},
title= {The elderly and their kin: Patterns of availability and access},
year = {1994},
editor = {Martin, L.G.},
editor = {Preston, S.H.},
booktitle = {Demography of aging},
address = {Washington, D.C.},
publisher = {National Academy Press},
pages = {146--194},
}