@article{ref1,
title="Appropriateness of the motor-free visual perception test when used with the trainable mentally retarded",
journal="Perceptual and motor skills",
year="1976",
author="Johnson, D. L. and Brekke, B. and Follman, D. E.",
volume="43",
number="3",
pages="1346-1346",
abstract="<p>[Abstract unavailable]</p> <p>Language: en</p>",
language="en",
issn="0031-5125",
doi="",
url="http://dx.doi.org/"
}