@article{ref1,
title="Invalidity in rural accidents",
journal="Wiadomosci Lekarskie",
year="1969",
author="Koska, W. and Szwabe, E.",
volume="22",
number="19",
pages="1765-1769",
abstract="<p>[Abstract unavailable]</p><p>Language: pl</p>",
language="pl",
issn="0043-5147",
doi="",
url="http://dx.doi.org/"
}