@article{ref1,
title="Occupational health in international airline operation",
journal="Journal of aviation medicine",
year="1958",
author="Schreuder, O. B.",
volume="29",
number="1",
pages="37-39",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0095-991X",
doi="",
url="http://dx.doi.org/"
}