@article{ref1,
title="Personal protection--the last resort?",
journal="Annals of occupational hygiene",
year="1976",
author="Crockford, G. W.",
volume="19",
number="3-4",
pages="345-350",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0003-4878",
doi="",
url="http://dx.doi.org/"
}