@article{ref1,
title="Aviation heroes",
journal="Pielȩgniarka i Połozna",
year="1968",
author="Bednarska, H.",
volume="8",
number="",
pages="20-21",
abstract="<p>[Abstract unavailable]</p><p>Language: pl</p>",
language="pl",
issn="0048-4148",
doi="",
url="http://dx.doi.org/"
}