@article{ref1,
title="The place of biological measurements in standard-setting concepts",
journal="Journal of Occupational Medicine",
year="1973",
author="Nelson, K. W.",
volume="15",
number="5",
pages="439-440",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0096-1736",
doi="",
url="http://dx.doi.org/"
}