@article{Condran1980,
author = {Condran, G. and Crimmins, E.},
title= {Mortality differentials between rural and urban areas of states in the northeastern United States 1890‒1900},
year = {1980},
doi = {10.1016/0305-7488(80)90111-5},
journal = {Journal of Historical Geography},
volume = {6},
number = {2},
pages = {179‒202},
}