@article{ref1,
title="The health of workers: a public health perspective of occupations",
journal="North Carolina medical journal",
year="1973",
author="Jones, W. B. Jr and Koomen, J. and Lumsden, J. C.",
volume="34",
number="7",
pages="515-518",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0029-2559",
doi="",
url="http://dx.doi.org/"
}