@article{Leonard2012,
author = {Leonard, S.H. and Beemer, J.K. and D.L., Anderton},
title= {Immigration, wealth and the ‘mortality plateau’ in emergent urban-industrial cities of the nineteenth-century Massachusetts},
year = {2012},
doi = {10.1017/S0268416012000215},
journal = {Continuity and Change},
volume = {27},
number = {3},
pages = {433--459},
}