@article{ref1,
title="Blood-lead levels in London taxi drivers",
journal="Lancet",
year="1972",
author="Howard, J. K.",
volume="2",
number="7776",
pages="545-545",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0140-6736",
doi="",
url="http://dx.doi.org/"
}