@article{ref1,
title="Irregular Attendance-A Cause of Retardation",
journal="Psychol Clin",
year="1909",
author="Ayres, Leonard P.",
volume="3",
number="1",
pages="1-8",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="",
doi="",
url="http://dx.doi.org/"
}