@article{Watkins1987,
author = {Watkins, S. and Menken, J. and Bongaarts, J.},
title= {Demographic welter foundations of family change},
year = {1987},
doi = {10.2307/2095354},
journal = {American Sociological Review},
volume = {52},
number = {3},
pages = {346--358},
}