@article{ref1,
title="Analysis of morbidity in dock-worker apprentices during the years 1964 to 1972",
journal="Zeitschrift fur die Gesamte Hygiene und Ihre Grenzgebiete",
year="1974",
author="Kersten, E. and Ulrich, H.",
volume="20",
number="3",
pages="152-156",
abstract="<p>[Abstract unavailable]</p> <p>Language: de</p>",
language="de",
issn="0049-8610",
doi="",
url="http://dx.doi.org/"
}