@article{ref1,
title="Aggressive and prosocial television programs and the natural behavior of preschool children",
journal="Monographs of the society for research in child development",
year="1973",
author="Friedrich, L. K. and Stein, A. H.",
volume="38",
number="4",
pages="1-64",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0037-976X",
doi="",
url="http://dx.doi.org/"
}