@article{ref1,
title="Letter: References on measurement of motor skill acquisition",
journal="Physical therapy",
year="1974",
author="Andrew, P. D.",
volume="54",
number="2",
pages="177-177",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0031-9023",
doi="",
url="http://dx.doi.org/"
}