@article{Friedlander1999,
author = {Friedlander, D. and Okun, B.S. and Segal, S.},
title= {The demographic transition then and now: processes, perspectives, and analyses},
year = {1999},
doi = {10.1177/036319909902400406},
journal = {Journal of Family History},
volume = {24},
number = {4},
pages = {493--534},
}