@article{ref1,
title="Physical defects of civilian pilots related to aircraft accidents: a new look at an old problem",
journal="Aerospace medicine",
year="1968",
author="Dougherty, J. D. and Harper, C. R.",
volume="39",
number="5",
pages="521-527",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0001-9402",
doi="",
url="http://dx.doi.org/"
}