@article{ref1,
title="Student injuries due to aggressive behavior in the Seattle public schools during the school year 1969-1970",
journal="American journal of public health",
year="1974",
author="Zoller, G. and Harlin, V. K. and Carter, A. P. and Johnson, C. J.",
volume="64",
number="9",
pages="904-906",
abstract="Abstract unavailable.",
language="",
issn="0090-0036",
doi="",
url="http://dx.doi.org/"
}