@article{ref1,
title="Effects of selected physical activities upon motor performance, perceptual performance and academic achievement of first graders",
journal="Perceptual and motor skills",
year="1969",
author="O'Connor, C.",
volume="29",
number="3",
pages="703-709",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0031-5125",
doi="",
url="http://dx.doi.org/"
}