@article{ref1,
title="A preliminary study of the awakening and startle effects of simulated sonic booms. NASA CR-1193",
journal="NASA contractor report. NASA CR.",
year="1968",
author="Lukas, J. S. and Kryter, K. D.",
volume="",
number="",
pages="1-68",
abstract="<p>[Abstract unavailable]</p> <p>Language: en</p>",
language="en",
issn="0565-7059",
doi="",
url="http://dx.doi.org/"
}