@article{ref1,
title="A factor analytic study of perceptual behavior in 4th and 5th grade children",
journal="Acta psychologica",
year="1970",
author="McWhinnie, H. J.",
volume="34",
number="1",
pages="89-97",
abstract="<p>[Abstract unavailable]</p> <p>Language: en</p>",
language="en",
issn="0001-6918",
doi="",
url="http://dx.doi.org/"
}