@article{ref1,
title="Factorial Structure of Impact and Damage Variables in Lightplane Accidents",
journal="Human factors",
year="1961",
author="Gregg, L. W. and Pearson, R. G.",
volume="3",
number="4",
pages="237-244",
abstract="<p>[Abstract unavailable]</p>",
language="",
issn="0018-7208",
doi="",
url="http://dx.doi.org/"
}