@article{ref1,
title="Injury-producing private motor vehicle accidents among airmen",
journal="Highway Research Board bulletin",
year="1961",
author="Barmack, Joseph Ephraim and Payne, Donald E.",
volume="285",
number="",
pages="1-22",
abstract="<p>[Abstract unavailable]</p>",
language="",
issn="0073-2206",
doi="",
url="http://dx.doi.org/"
}