@article{ref1,
title="Mercury: despite warnings, still a hazard in some offices",
journal="Dental survey",
year="1977",
author="Robinson, H. B.",
volume="53",
number="7",
pages="7-7",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0011-8788",
doi="",
url="http://dx.doi.org/"
}