@article{Condran2008,
author = {Condran, G.A. and J., Murphy},
title= {Defining and Managing Infant Mortality a Case Study of Philadelphia, 1870–1920},
year = {2008},
doi = {10.1215/01455532-2008-006},
journal = {Social Science History},
volume = {32},
number = {4},
pages = {473−513},
}