@article{ref1,
title="Years of the Profession Cooperative Accident Prevention",
journal="Deutsche Medizinische Wochenschrift",
year="1935",
author="Michels, W",
volume="79",
number="",
pages="1407-1409",
abstract="<p>[Abstract unavailable]</p>",
language="",
issn="0012-0472",
doi="",
url="http://dx.doi.org/"
}