@article{ref1,
title="Derivation of an efficient nonvocal communication system",
journal="Human factors",
year="1982",
author="Goodenough-Trepagnier, C. and Tarry, E. and Prather, P.",
volume="24",
number="2",
pages="163-172",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0018-7208",
doi="",
url="http://dx.doi.org/"
}