@article{Singh1985,
author = {Singh, S. and Casterline, J. B.  and Cleland, J. G.},
title= {The Proximate Determinants of Fertility: Sub-national Variations},
year = {1985},
doi = {10.1080/0032472031000141316},
journal = {Population Studies},
volume = {39},
number = {1},
pages = {113--135},
}