@article{ref1,
title="Epidemiology of USAF spatial disorientation aircraft accidents, 1 Jan 1958-31 Dec 1968",
journal="Aerospace medicine",
year="1971",
author="Barnum, F. and Bonner, R. H.",
volume="42",
number="8",
pages="896-898",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0001-9402",
doi="",
url="http://dx.doi.org/"
}