@article{ref1,
title="Responses of retarded children on three and two dimensional visual tasks",
journal="Exceptional children",
year="1969",
author="Bradley, B. H.",
volume="36",
number="3",
pages="165-170",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0014-4029",
doi="",
url="http://dx.doi.org/"
}