@article{ref1,
title="Analysis of disease and mental health in the social structure of Spain",
journal="Revista de sanidad e higiene publica",
year="1970",
author="Sierra Bravo, R.",
volume="44",
number="8",
pages="909-948",
abstract="<p>[Abstract unavailable]</p> <p>Language: es</p>",
language="es",
issn="0034-8899",
doi="",
url="http://dx.doi.org/"
}