@article{ref1,
title="Spectra and Loudnesses of Modern Automobile Horns",
journal="Journal of the Acoustical Society of America",
year="1951",
author="Callaway, DB",
volume="23",
number="1",
pages="55-58",
abstract="<p>[Abstract unavailable]</p>",
language="",
issn="0001-4966",
doi="",
url="http://dx.doi.org/"
}