@article{ref1,
title="Flight physicians in civil aviation?",
journal="Zeitschrift für Allgemeinmedizin",
year="1973",
author="",
volume="49",
number="17",
pages="842-842",
abstract="<p>[Abstract unavailable]</p><p>Language: de</p>",
language="de",
issn="0300-8673",
doi="",
url="http://dx.doi.org/"
}