@article{ref1,
title="Rotary pursuit performance as a function of mental age",
journal="Perceptual and motor skills",
year="1957",
author="Ellis, Norman R. and Sloan, William",
volume="7",
number="3",
pages="267-270",
abstract="<p>[Abstract unavailable]</p>",
language="en",
issn="0031-5125",
doi="10.2466/pms.1957.7.3.267",
url="http://dx.doi.org/10.2466/pms.1957.7.3.267"
}