@article{ref1,
title="A preliminary study of a test for air traffic controllers",
journal="Journal of applied psychology",
year="1966",
author="Hartson, L. D.",
volume="50",
number="2",
pages="138-142",
abstract="<p>[Abstract unavailable]</p> <p>Language: en</p>",
language="en",
issn="0021-9010",
doi="",
url="http://dx.doi.org/"
}