@article{ref1,
title="Perceptual-motor functioning and school achievement in lower-class black children",
journal="Perceptual and motor skills",
year="1974",
author="Greenberg, J. W. and Alshan, L. M.",
volume="38",
number="1",
pages="60-62",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0031-5125",
doi="",
url="http://dx.doi.org/"
}