@article{ref1,
title="Perceptual and motor speed in an extended age group: a factor analysis",
journal="Perceptual and motor skills",
year="1960",
author="Clark, James A. and King, Gerald F.",
volume="11",
number="2",
pages="99-102",
abstract="<p>[Abstract unavailable]</p>",
language="en",
issn="0031-5125",
doi="10.2466/pms.1960.11.2.99",
url="http://dx.doi.org/10.2466/pms.1960.11.2.99"
}