@article{ref1,
title="Rotation errors made by brain-injured and familial children on two visual-motor tests",
journal="American journal of mental deficiency",
year="1954",
author="Halpin, V. G.",
volume="59",
number="3",
pages="485-489",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0002-9351",
doi="",
url="http://dx.doi.org/"
}