@article{ref1,
title="Familial variables related to the expression of violent aggression in preschool-age children",
journal="Journal of genetic psychology",
year="1973",
author="Abramson, P. R.",
volume="122",
number="2d Half",
pages="345-346",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0022-1325",
doi="",
url="http://dx.doi.org/"
}