@article{ref1,
title="The psychophysical testing of an aircraft visual approach aid",
journal="Human factors",
year="1961",
author="Day, R. H. and Baxter, JR and Lane, J. C.",
volume="2",
number="",
pages="203-210",
abstract="<p>[Abstract unavailable]</p>",
language="",
issn="0018-7208",
doi="",
url="http://dx.doi.org/"
}