@article{ref1,
title="Underachievement among preadolescent boys considered in relationship to passive aggression",
journal="Journal of educational psychology",
year="1969",
author="Morrison, E.",
volume="60",
number="3",
pages="168-173",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0022-0663",
doi="",
url="http://dx.doi.org/"
}