@article{ref1,
title="Aircraft Accidents and Aircraft Instruments",
journal="Aerospace medicine",
year="1961",
author="Zeller, A. F. and Normand, G. H. and Burke, J. M.",
volume="32",
number="1",
pages="42-42",
abstract="[Abstract unavailable]  <p>Language: en</p>",
language="en",
issn="0001-9402",
doi="",
url="http://dx.doi.org/"
}