@article{ref1,
title="Comparative study of professional hazards in various industrial branches in Mexico",
journal="Gaceta Medica de Mexico",
year="1967",
author="Arreguín Vélez, E.",
volume="97",
number="4",
pages="447-467",
abstract="<p>[Abstract unavailable]</p><p>Language: es</p>",
language="es",
issn="0016-3813",
doi="",
url="http://dx.doi.org/"
}