@article{ref1,
title="Acoustic and vibration background noise in the collapsed structure of the World Trade Center",
journal="Journal of the Acoustical Society of America",
year="2003",
author="Gabrielson, Thomas B. and Poese, Matthew E. and Atchley, Anthony A.",
volume="113",
number="1",
pages="45-48",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0001-4966",
doi="",
url="http://dx.doi.org/"
}