@article{ref1,
title="Hearing acuity and exposure to patrol aircraft noise",
journal="Aerospace medicine",
year="1969",
author="Pierson, W. R. and Barron, C. I.",
volume="40",
number="10",
pages="1099-1101",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0001-9402",
doi="",
url="http://dx.doi.org/"
}