@article{Poston1990,
author = {Poston, D.L. and Jia, Z.},
title= {Socioeconomic structure and fertility in China: A county level investigation},
year = {1990},
doi = {10.1017/S0021932000018915},
journal = {Journal of Biosocial Science},
volume = {22},
number = {4},
pages = {507--515},
}