@article{ref1,
title="Visual performance and accident frequency",
journal="Journal of applied psychology",
year="1949",
author="Tiffin, J. and Parker, B. T. and Habersat, R. W.",
volume="33",
number="5",
pages="499-502",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0021-9010",
doi="",
url="http://dx.doi.org/"
}