@article{ref1,
title="Human operator describing functions with visual and tactile displays. NASA CR-623",
journal="NASA contractor report. NASA CR.",
year="1967",
author="Bliss, J. C.",
volume="",
number="",
pages="163-175",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0565-7059",
doi="",
url="http://dx.doi.org/"
}