@article{Sundstrom1988,
author = {Sundstrom, W.A. and David, P.A},
title= {Old-age security motives, labor markets, and farm family fertility in antebellum American},
year = {1988},
doi = {10.1016/0014-4983(88)90015-0},
journal = {Explorations in Economic History},
volume = {25},
number = {2},
pages = {164--197},
}