@article{ref1,
title="An International Symposium on Objective Assessment of Work Load in Air Traffic Control Tasks held at the Institute of Arbeitswissenschaft, the University of Technology, Darmstadt, German Federal Republic",
journal="Ergonomics",
year="1971",
author="Rohmert, W.",
volume="14",
number="5",
pages="545-547",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0014-0139",
doi="10.1080/00140137108931273",
url="http://dx.doi.org/10.1080/00140137108931273"
}