@article{ref1,
title="A study to measure changes in behavior of aggressive mentally retarded adolescent girls in a permissive classroom",
journal="American journal of mental deficiency",
year="1959",
author="Harris, L. M. and Sievers, D. J.",
volume="63",
number="6",
pages="975-980",
abstract="<p>[Abstract unavailable]</p> <p>Language: en</p>",
language="en",
issn="0002-9351",
doi="",
url="http://dx.doi.org/"
}