@article{ref1,
title="Epidemiologic studies and control programs in alcoholism. 5. The epidemiology of problem drinking",
journal="American journal of public health",
year="1967",
author="Knupfer, G.",
volume="57",
number="6",
pages="973-986",
abstract="<p>[Abstract unavailable]</p>",
language="",
issn="0090-0036",
doi="",
url="http://dx.doi.org/"
}