@article{ref1,
title="Epidemiology of aerial application accidents",
journal="Aerospace medicine",
year="1969",
author="Ryan, G. A. and Dougherty, J. D.",
volume="40",
number="3",
pages="304-309",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0001-9402",
doi="",
url="http://dx.doi.org/"
}