@article{ref1,
title="Spontaneous morbidity notification, morbidity and sick leave of seamen and fishermen during voyages, according to the reports of ship's surgeons",
journal="Biuletyn Instytutu Medycyny Morskiej w Gda'nsku",
year="1972",
author="Krynicki, A.",
volume="23",
number="3",
pages="139-148",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0020-4463",
doi="",
url="http://dx.doi.org/"
}