@article{ref1,
title="Fluctuations in high-sea fishing--views on the professional chances of the aging man in seafaring from the industrial medicine view-point",
journal="Zeitschrift fur die Gesamte Hygiene und Ihre Grenzgebiete",
year="1971",
author="Kersten, E. and Ulrich, H.",
volume="17",
number="9",
pages="637-641",
abstract="<p>[Abstract unavailable]</p><p>Language: de</p>",
language="de",
issn="0049-8610",
doi="",
url="http://dx.doi.org/"
}