@article{Leonard2012,
author = {Leonard, S.H. and Beemer, J.K. and Anderton, D.L.},
title= {Immigration, Wealth and the ‘Mortality Plateau’ in Emergent Urban-Industrial Cities of Nineteenth-Century Massachusetts},
year = {2012},
doi = {10.1017/S0268416012000215},
journal = {Continuity and Change},
volume = {27},
number = {3},
pages = {433−459},
}