@article{ref1,
title="Color versus numeric coding in a keeping-track task: performance under varying load conditions",
journal="Journal of applied psychology",
year="1973",
author="Wedell, J. and Alden, D. G.",
volume="57",
number="2",
pages="154-159",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0021-9010",
doi="",
url="http://dx.doi.org/"
}