@article{ref1,
title="Visual and tactile tracking with step commands. NASA CR-623",
journal="NASA contractor report. NASA CR.",
year="1967",
author="Bliss, J. C. and Brody, W. R. and Lane, B.",
volume="",
number="",
pages="119-161",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0565-7059",
doi="",
url="http://dx.doi.org/"
}