@article{ref1,
title="A Statistical Guide for Accident Research, Illustrated by Application to Non-Air-Carrier Flying, 1949-51",
journal="Journal of the Operations Research Society of America",
year="1955",
author="Duncan, AJ",
volume="3",
number="1",
pages="77-90",
abstract="[Abstract unavailable]  <p>Language: en</p>",
language="en",
issn="0096-3984",
doi="",
url="http://dx.doi.org/"
}