@article{ref1,
title="Perceptual, motor, and memory functions in the visual retention test",
journal="American journal of mental deficiency",
year="1962",
author="Silverstein, A. B.",
volume="66",
number="",
pages="613-617",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0002-9351",
doi="",
url="http://dx.doi.org/"
}