@article{ref1,
title="Physical defects of civilian pilots related to aircraft accidents",
journal="Aerospace medicine",
year="1964",
author="Harper, C. R.",
volume="35",
number="",
pages="851-856",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0001-9402",
doi="",
url="http://dx.doi.org/"
}