@article{Costa2010,
author = {Costa, D.L. and Kahn, M.E.},
title= {Health, wartime stress, and unit cohesion: Evidence from Union Army veterans},
year = {2010},
doi = {10.1353/dem.0.0095},
journal = {Demography},
volume = {47},
number = {1},
pages = {45--66},
}