@article{ref1,
title="Audiometric findings in head injuries in aviation",
journal="Rivista di medicina aeronautica",
year="1957",
author="Koch, C.",
volume="20",
number="3",
pages="455-461",
abstract="<p>[Abstract unavailable]</p><p>Language: it</p>",
language="it",
issn="0301-6757",
doi="",
url="http://dx.doi.org/"
}