@article{ref1,
title="Infrasonic spectra of modern airplane propeller vibrations",
journal="Médecine Aéronautique et Spatiale",
year="1954",
author="Grognot, P.",
volume="9",
number="4",
pages="477-482",
abstract="<p>[Abstract unavailable]</p><p>Language: fr</p>",
language="fr",
issn="0294-0817",
doi="",
url="http://dx.doi.org/"
}