@article{ref1,
title="A teaching sequence for the training of visual and motor perception",
journal="American journal of mental deficiency",
year="1958",
author="Jolles, I.",
volume="63",
number="2",
pages="252-255",
abstract="<p>[Abstract unavailable]</p> <p>Language: en</p>",
language="en",
issn="0002-9351",
doi="",
url="http://dx.doi.org/"
}