@article{Freedman1961,
author = {Freedman, R. and Whelpton, P.K. and Smith, J.W.},
title= {Socio-Economic Factors in Religious Differentials in Fertility},
year = {1961},
doi = {10.2307/2090259},
journal = {American Sociological Review},
volume = {26},
number = {4},
pages = {608--614},
}