@article{ref1,
title="Attempts to improve perceptual clarity in an aircraft display",
journal="Nature",
year="1967",
author="Huddleston, H. F. and Samuel, G. D.",
volume="215",
number="5102",
pages="787-788",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0028-0836",
doi="",
url="http://dx.doi.org/"
}