@article{Herd2007,
author = {Herd, P. and Goesling, B. and House, J.S.},
title= {Socioeconomic position and health: The differential effects of education versus income on the onset versus progression of health problems},
year = {2007},
doi = {10.1177/002214650704800302},
volume = {48},
number = {3},
pages = {223--238},
}