@article{ref1,
title="Factors influencing personal exposure to gas and dust in workplace air: application of a visualisation technique",
journal="Safety science",
year="1992",
author="Gray, MI and Unwin, J. and Walsh, PT and Worsell, N",
volume="15",
number="4-6",
pages="273-282",
abstract="<p>[Abstract unavailable]</p>",
language="en",
issn="0925-7535",
doi="",
url="http://dx.doi.org/"
}