@article{ref1,
title="To investigate the problems of visual perception and recognition of aircraft traveling at trans and supersonic speeds",
journal="Quarterly research report. USAF School of Aviation Medicine",
year="1948",
author="Jennings, A. L.",
volume="60",
number="",
pages="10-10",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="",
doi="",
url="http://dx.doi.org/"
}