@article{ref1,
title="High school yearbooks: a nonreactive measure of social isolation in graduates who later became schizophrenic",
journal="Journal of abnormal psychology",
year="1968",
author="Barthell, C. N. and Holmes, David S.",
volume="73",
number="4",
pages="313-316",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0021-843X",
doi="",
url="http://dx.doi.org/"
}