@article{ref1,
title="The incidence of brain injury in public school special classes for the educable mentally handicapped",
journal="American journal of mental deficiency",
year="1956",
author="Beck, H. S.",
volume="60",
number="4",
pages="818-822",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0002-9351",
doi="",
url="http://dx.doi.org/"
}