@article{Hayward1989,
author = {Hayward, M.D. and Grady, W.R. and Hardy, M.A. and Sommers, D.},
title= {Occupational influences on retirement, disability, and death},
year = {1989},
doi = {10.2307/2061600},
journal = {Demography },
volume = {26},
number = {3},
pages = {393‒409},
}