@article{ref1,
title="Sick and accident rate of mining apprentices in the course of their apprenticeship",
journal="Pracovni Lekarstvi",
year="1966",
author="Cerný, J.",
volume="18",
number="8",
pages="356-359",
abstract="<p>[Abstract unavailable]</p><p>Language: cs</p>",
language="cs",
issn="0032-6291",
doi="",
url="http://dx.doi.org/"
}