@article{ref1,
title="Excretory and biologic threshold limits",
journal="American Industrial Hygiene Association journal",
year="1967",
author="Elkins, H. B.",
volume="28",
number="4",
pages="305-314",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0002-8894",
doi="10.1080/00028896709342528",
url="http://dx.doi.org/10.1080/00028896709342528"
}